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Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
French doors look beautiful and open in a heartbeat — that is exactly why they need a second lock. The glass is usually the strongest panel, while the handles and the original latch are the soft spots. A reinforcement lock, a bar that clamps the two handles together, or a smart deadbolt turns that weak point into a real barrier. This guide breaks down seven genuinely different ways to secure a double door, so you can match the fix to your door, your budget, and who you are trying to keep out.
This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Some doors need a lock you can arm in seconds from the inside, some need keyless entry for the whole family, and some just need a childproof bar so a toddler stops escaping. Below you will find the honest differences between a handle-to-handle bar, a deadbolt set, and a full smart lock — everything that matters when you are shopping for the locks for french doors.
Top Picks
How To Choose Locks for French Doors
The first thing to understand is that a French door usually has two panels, and only one of them is the “active” door that swings. The other is a “slave” door that just sits there. That single detail decides which locks will actually work, because many products clamp the two handles together and need both handles to line up. Before you buy anything, stand at the door and measure the gap between the two handles. Many bar-style locks state a maximum handle distance — one of the picks here tops out at 185mm — and if your gap is wider, the bar simply will not reach.
Measure your handle gap and handle width first
This is the single most common reason a French door lock gets returned. Run a tape measure between the two handles and write the number down. Then measure the width of the handle neck where the lock will clamp on. A bar that needs a slim neck will not grab a chunky, curved lever. Some locks list a hard maximum on that neck width — the childproof bar below caps it at 32mm. Curved handles are the other trap: some locks state plainly that they only fit straight knobs.
Decide what you are actually defending against
Not every buyer needs the same thing. A family with a toddler or a curious pet usually wants a bar that stops the door from being pushed open, and they want it easy to release in an emergency. A homeowner worried about break-ins wants a bar that holds the handles together so the outside latch cannot be worked. Someone replacing an old front-door set wants a full handle-and-deadbolt kit that keys from outside and turns from inside. And if you want keyless entry for the whole household, a smart lock with a keypad or fingerprint reader is the direction to go. Match the lock to your real problem, not to the longest feature list.
Check the install: drilling versus clamp-on
You avoid drilling because the door is glass. A clamp-on or slide-on lock installs with no new holes, which is why several picks here lean on that strength. A deadbolt or smart lock, by contrast, needs an existing bore hole in the door and a standard door thickness to fit — the smart lock here fits doors 1-3/8″ to 2″ thick, and the Philips fits 1-3/8″ to 1-3/4″. If your door is thicker or thinner than that range, a full deadbolt swap may not be for you, and a clamp-on bar is the safer route.
Side-by-Side Comparison
| Model | Best For | Lock Type | Material | Item Weight | Amazon |
|---|---|---|---|---|---|
| Patlock French Door Security Lock★ Best Overall | Handle-to-handle bar with no drilling | Ratchet | Reinforced thermoplastic | 921 g | Amazon |
| Veise VE017-H Smart Lock SetTop Performer | Keyless fingerprint entry | Biometric, Deadbolt, Keypad | Zinc Alloy | 5.2 pounds | Amazon |
| Philips Smart Deadbolt Set | Family keypad entry with 2 handles | Lock Set | Aluminum | 2.97 kg | Amazon |
| TICONN Front Door Handle Set | Replacing a worn front-door set | Key Lock | Zinc, Brass | — | Amazon |
| French Door Reinforcement Lock | Childproof bar for double doors | Adjustable bar | Aluminum | 1.3 pounds | Amazon |
| Probrico Lever & Deadbolt Combo | Budget handle-and-deadbolt refresh | Key Lock | Zinc, Nickel | — | Amazon |
| Kwikset Henley Lock Set | Rekey-it-yourself deadbolt set | Key Lock | Metal | — | Amazon |
Detailed Reviews
1. Patlock French Door Security Lock
Our pick — 4.5+★ from 12,000+ verified ratings; the strongest balance of quality and price.
The bar that clamps both handles together and makes the outside latch useless.
If your French door has two internal horizontal handles, this is the lock to beat. It slides over both handles and tightens with ratchet locking bars — a toothed bar you squeeze shut — so the two handles are pinned together and the door cannot be swung from outside. There is no key and no code. You arm it from inside in seconds and release it just as fast, which matters when you need to get out in a hurry. The weight is 921 g, which tells you it is a solid moulded block rather than a flimsy clip, and it earned 4.5+ stars across 12,000+ owner ratings — the crowd favourite in this lineup by a wide margin.
What owners notice first is the build. The case is a reinforced thermoplastic body with soft inserts that sit against the door handles so they do not get scuffed, and the two locking bars are nickel-coated steel. One owner summed up four months of daily use on front double doors as “sturdy, easy to use, no drilling needed,” and the pattern holds: it installs without a single new hole in a glass door. The security design is the other half of the story. Because the handles are locked to each other, the outside latch has nothing to grip — the door mechanism stays in the locked position even if the outer lock is compromised. The manufacturer also supplies tamper-resistant steel door spindles, which are the pins that connect a handle to the latch inside the door.
Here is the honest catch. This is a visual and mechanical deterrent, not an unbreakable vault. Owners describe it as something that stops a door being quietly opened and slows an intruder down, and it cannot be operated from outside by anyone, including you. That last point is exactly why it is a strong childproofing pick too — one owner mentions it kept a toddler out of a bedroom while older children could still work it. The less happy note: it ships from the UK, and a few buyers describe slow delivery with no tracking. Check compatibility before you buy — the maker states it fits most double doors with two internal horizontal handles, and it is not the right choice for a single door.
The case for it
- Arms in seconds from inside with a ratchet bar and releases just as fast
- No keys, no codes, no drilling — nothing to lose and nothing to remember
- Soft handle inserts protect your door hardware while it is clamped on
- Holds the police “Secured by Design” specification and carries a 5-year warranty
Where it asks for patience
- Cannot be opened from outside, so it is an inside-only lock by design
- Only suits double doors with two internal horizontal handles
- UK dispatch means slower delivery for some buyers
Settle the door in one move: pick this if you want maximum security with zero drilling on a standard double door with two handles.
Look elsewhere for: a single-panel door or a keyed outside entry — this one deliberately locks you out.
2. Veise VE017-H 8-in-1 Fingerprint Smart Front Door Lock Set
A fingerprint reader that opens the door in 0.2 seconds and a keypad for everyone else.
This is the pick for a busy front door where different people come and go all day — family, a cleaner, a dog walker. It gives you eight ways in: fingerprint, app, remote authorization, IC card, PIN code, personalized passcodes, voice commands, or the old-fashioned mechanical key. The headline number is the fingerprint speed at 0.2 seconds, backed by AI self-learning biometric technology the maker rates at 99.99% accuracy that improves as it reads your prints. It stores 20+ fingerprints and it runs on 4 AA batteries that the maker rates for up to 12 months, with an emergency power port so you are never stranded outside with a dead lock.
What wins people over is sheer functionality — the breadth of entry options and the fact the app keeps a record of who came and went. Installation is the quiet second strength: buyers report getting it on the door in around 20 to 30 minutes with the included hardware, calling it sturdy and sleek. The handle is solid zinc alloy by the looks of the 5.2-pound weight, and the lock carries a BHMA/ANSI Grade 3 construction rating, meaning it passed a basic commercial durability standard, plus an IP55 waterproof rating, which means it shrugs off rain and dust. The body is a retro-styled handle married to a backlit touchscreen keypad, so it looks like a classic handle set rather than a plastic slab. It fits doors 1-3/8″ to 2″ thick and works on left- or right-handed doors.
The trade-off to size up is long-term durability of the handle mechanism. Reviews flag the handle quality and long-term durability as the weaker spots — one buyer describes the mechanical part inside the handle stripping after about a year so the door could not be opened from inside. The good news is that the maker’s support gets consistent praise for sending replacements quickly. One buyer wrote: “The mechanical part in the inside of the handle stripped and we could no longer open the door from the inside. I contacted the company’s support and the process to get a replacement was quick and easy.” Note this is a full deadbolt-and-handle replacement, so think twice if your door has no existing bore hole — unlike the Patlock above, it needs a standard pre-drilled door.
Feature-per-dollar leader: eight open up methods, a fingerprint reader, an app, auto-lock with a customizable 10-180s delay, and a Grade 3 construction rating on one handle set.
Plan around the handle: the locking brain is reliable, but the mechanical handle is the part that gets reported as wearing out first — factor in the strong support channel.
Reach for this if: you want one door that everyone in the house can open without a key and you keep a backup key for guests.
Not the one for: a door with no existing bore hole, or a buyer who wants zero electronics to fail.
3. Philips Smart Deadbolt Lock
Two lever handles and a fingerprint pad, so you upgrade both sides of the door in one box.
Most lock sets make you choose between a handle and a deadbolt — this one hands you both. The package includes two lever handles plus the Philips lock, so you replace the old, worn handle and add a keypad deadbolt in a single purchase. Four ways to open it: fingerprints, PIN codes, the mechanical key, or the app. The fingerprint reader holds up to fifty prints, which is the largest capacity here, and you get unlimited one-time PINs plus 100 user PINs for the household. Bluetooth works within 8 to 10 meters, so the phone in your pocket opens it, and pairing a Philips Wi-Fi Bridge (sold separately) open up voice control through Amazon Alexa or Google Assistant plus remote lock and open up.
The thing everyone raves about is the overall build quality — owners repeatedly describe the lock as sturdy with a sleek matte-black finish, and the install is described as a simple screwdriver job most people finish in about 20 minutes. It fitted a high-traffic family door with multiple passcodes for everyone, and owners say it just keeps working. The auto-lock is the headline comfort feature: the door secures itself after you leave, so you stop lying in bed wondering whether you locked up. One detail worth knowing — the lock has no door sensor, so the door must be fully closed for the auto-lock to engage. The maker also flags replacing batteries promptly after a low warning to keep performance up.
Two honest points. First, the app gets mixed feedback, with one owner describing it as “dysfunctional” and reporting Bluetooth trouble until Philips support stepped in and fixed the setup — the lock itself then performed well. The second is the fingerprint reader, which works great for some people and is finicky for others; one buyer notes a spouse’s prints stopped reading after a few days. Since it also takes a PIN, a key, and your phone, you are never locked out if the sensor misreads you. The WiFi gateway is a separate purchase, so factor that in if remote access matters — unlike the Veise above, which pairs with its own G1 gateway, this one needs the Philips bridge for voice and remote features.
My pick for families: buy this if you want the handle and the smart lock replaced together and you appreciate having backup PIN and key access when the sensor is moody.
Think twice if: you need remote open up or voice control from the start — the Wi-Fi bridge is sold separately.
4. TICONN Front Door Handle Set
A complete matte-black handle-and-deadbolt set that dresses up an entrance door fast.
If your goal is a simple, good-looking handle-and-deadbolt upgrade rather than a lock you operate from inside the frame, this TICONN set does the job. It is built from zinc alloy with brass parts, the maker states it is rust-free in a high-humidity environment, and the coating is designed not to crack or fade in direct sunlight. Both the keyed handle and the deadbolt in a single pack share the same key, so one key opens the whole thing, while keys are deliberately not interchangeable between different packs — good to know if you buy two sets, because they will not match. It fits both right- and left-handed doors, and installation is a screwdriver job on a standard pre-drilled door.
The look is the winning card. Owners describe loving the color and the modern square lever, and it does what a handle set should — it dress up a tired front door without a locksmith. Installation lives up to the “minutes” claim in the maker’s copy. Where this sits versus a full smart lock is a genuine split for a French door set-up: this is a keyed mechanical set with no keypad and no fingerprint reader, and the lock is usable from outside with a key only, so it pairs naturally with a bar lock on a double door rather than replacing one. The deadbolt locks and opens from outside with a key and turns from inside with a thumb-turn button.
The honest picture from owners is more mixed than the top picks. Durability and reliability land as mixed signals — most buyers are happy with how it looks and installs, while a smaller group reports the mechanism giving trouble over time. One owner found the lock stopped working in under a year, though the company sent a replacement promptly, and the maker stands behind the product with a satisfaction guarantee. There is also a fair note that its internals are lighter and clunkier than a solid-brass set that costs more. What that means in practice: it is a great value-day-one upgrade for a low-traffic door, and a less sure bet for your most heavily used entrance.
Where it shines: the finish and the install. It installs fast on a pre-drilled door and looks like a much pricier set from the street.
Ideal for refresh projects: a landlord or homeowner replacing a dated handle set who wants a clean look without a big spend.
Consider a heavier build if: you want a main entrance stood on dozens of times a day — a brass-bodied set may hold longer.
5. French Door Lock Childproof
A one-piece aluminum bar that slides between the handles and holds the door shut.
For a smaller spend than any smart lock here, this bar does one job very well: it stops a double door from being pushed open. The body is cut from a single piece of 1/2″-thick aluminum, so there is no joint to fail, and it is designed to survive a forced shove. Three pin slots let you match the bar to different handle gaps — 6 3/8″, 6 7/8″, and 7 5/16″ — and it is reversible to fit any door orientation. No wiring, no batteries, no code to remember. It arms and disarms in seconds, and the maker pitches that speed as the whole point: in a moment of attempted entry, a lock you can slap on instantly buys you reaction time.
Functionality is what earns it the most praise, and the everyday scenes are the proof. It is popular with pet owners and parents — one buyer whose cat kept nosing the office French doors open put it on and wrote that it “solved the problem” and is “easy to take on and off.” Another buyer with a toddler reports the bar keeps the child from slipping through the doors, noting only a small crack remains that they watch for little fingers. A third reports it fits like a glove on a Canadian double door’s 8.75″ setting, describing it as strong, unbendable, and secure with minimal play. That is real-world evidence from several different homes, not one lucky install.
The catch is fit, and it is a real one. It only suits standard straight door knobs and does not fit curved ones, so measure before you order. The maker gives hard numbers: the handle neck width should not exceed 32mm and the gap between the two handles should not exceed 185mm. There is also a note from one owner that the thin toggle rod and the inside handles are the weaker points — reasonable to expect on any bar lock, since no two-handle clamp can be stronger than the handles it grabs. It will not stop a determined intruder on its own, but it does add a real second layer of defence if the primary lock fails — and it is the least expensive way to get one.
Grab this if: you want a childproof or pet-proof bar for a double door and you know your handle gap is under the maker’s limit.
Skip only if: your door has curved, chunky knobs or a wide handle spacing — this bar will not clamp them.
6. Probrico Passage Door Lever
The entry-level combo that replaces an old handle and adds a deadbolt at the same time.
If you want a modern lever-and-deadbolt look without spending much, this Probrico set gets you there. You get a passage lever plus a single-cylinder deadbolt in one box, both finished in brushed nickel with a square rose — the round plate the handle mounts on. The deadbolt locks and opens with a key from outside and turns from inside with a thumb-turn button, so you are never fumbling for a key to get out. Every deadbolt set in a pack comes with the same key. It fits both right- and left-handed doors and installs with just a Phillips screwdriver on an existing pre-drilled door, which is the fastest route to a fresh look on a rental or a quick flip.
Owners are broadly happy with how this set installs and looks. The reported weak spot is the finish — it can wear off quickly on a heavily used handle, and the locking mechanism divides opinion a little. Picture: it is a genuine, working entry set for the money, not a heavy architectural-grade piece, so it suits lighter-traffic doors where the handle is not turned a few hundred times a day. The zinc body keeps the weight down, and the ambidextrous design means no left-hand or right-hand choice to get wrong at checkout — a small thing that saves a return.
Where this fits against the rest is as the value end of the keyed sets. Unlike the TICONN set with its brass parts, this one is all-zinc and nickel, which is the sensible trade if you want the look for less and accept that the finish has a shorter shelf life. Pair it with one of the bar locks above on a double door and you have a keyed handle, a deadbolt, and a handle-clamp barrier for well under what a smart lock alone runs you. Just do not expect the milled feel of a higher-tier set — the internals are the basic kind, and the finish is the part that tells the age first.
The budget bet: one handle, one deadbolt, order once, install in minutes — the simplest way to make an old door new.
Not a forever piece: the finish is the part owners mention fading, so it is best on a door that does not see constant use.
Best for small projects: a rental, a spare-room door, or a light-use entrance where looks matter and price matters more.
Step up if: this is the main front door of a busy household — the brass-bodied sets hold their finish longer.
7. Kwikset Henley Front Door Lock Set
The set you can re-key to your own key in seconds, no locksmith and no new cylinder.
The defining feature here is SmartKey Security — Kwikset’s re-key system that lets you change the lock to match a key you already own in seconds, without taking the lock apart or calling a locksmith. For a landlord turning over a rental between tenants, that is a genuinely useful trick. This is a full handleset with a deadbolt: an exterior keyed deadbolt, an interior locking turn piece, a grip and an interior lever, all operated by key from outside. It fits standard doors 1-3/4″ thick, and the adjustable latch twists to either a 2-3/8″ or 2-3/4″ backset — the distance from the door edge to the handle hole — so it matches nearly any standard door prep. Installation is a screwdriver job, and it is designed for remodels, upgrades, and move-ins.
The appeal for a French door pair is the uniformity. Re-key both leaves to the same key and you operate the whole door with one key, and the matte-black square lever keeps the look consistent. The maker backs it with a lifetime mechanical and finish warranty, which is the longest coverage of any set here, and it is built for the kind of doors you find in homes, condos, apartments, and short-term rentals. The ergonomic grip is comfortable for most hands, and the ambidextrous design fits a right- or left-swinging door.
Now the honest part. This is the least-reviewed set on the list by a wide margin, so the buyer signal is thin compared with the crowd-favourite Patlock. If you want a large body of owner experience behind your purchase, this is not the one. What it offers instead is a specific, valuable skill — self re-keying — plus a lifetime mechanical warranty, for buyers who value changing the key without a service call. Verify your door thickness at 1-3/4″ first, since it is built specifically for that standard size, and confirm you have a two-bore-hole front door for the handleset to seat properly.
what separates it: SmartKey re-keying means you can hand a new tenant a working key in seconds and retire the old one — the standout spec for anyone managing multiple doors.
Best if you value control: a landlord, DIYer, or mover who wants to re-key the lock themselves and keep it keyed for the long haul.
Want a proven track record instead: the widely-reviewed handle-clamp and smart locks above carry far more owner history.
Know the Specs
Handle spacing and neck width
This is the make-or-break measurement for any bar-style French door lock. The lock clamps onto both handles, so it only works if the handles are close enough and slim enough. One pick here requires a handle neck width no wider than 32mm and a gap between handles no greater than 185mm, and offers three pin slots at 6 3/8″, 6 7/8″, and 7 5/16″. Measure both numbers before you buy — it is the difference between a snug install and a return.
open up methods and entry speed
Mechanical sets open with a key from outside and a thumb-turn inside. Clamp-on bars open from inside in seconds with no key at all. Smart locks add fingerprints, PIN codes, apps, and cards — one pick opens on a fingerprint in 0.2 seconds, others hold up to 50 fingerprints or 100 user PINs. More methods means more ways your household gets in without a key, but also more electronics that can fail. Match the method to who is actually coming and going.
Common Questions
Can I add a lock to French doors without drilling into the glass frame?
Will a handle-clamp lock fit my double doors?
How do I stop a toddler or pet from opening my French doors?
Do French door locks need to open from the inside without a key for safety?
Are these locks compatible with smart home voice assistants?
How long do the batteries last on a smart French door lock?
What door thickness does a smart or electronic lock fit?
Can I re-key a French door lock myself without a locksmith?
Is a clamp-on bar or a smart deadbolt better for securing a French door?
Will a clamp-on bar stop a determined intruder on its own?
The Bottom Line
For most people shopping for locks for french doors, the winner is the Patlock French Door Security Lock because it needs no drilling, arms both handles together in seconds, and carries the police-secured specification plus a 5-year warranty — and it is the clear crowd favourite at 4.5+ stars. If you want keyless fingerprint entry for the whole family, the Veise VE017-H packs eight open up methods and a Grade 3 body into one set. And for a small double door that a toddler or pet keeps opening, the childproof reinforcement bar is the one to reach for. Whichever way you go, measure your handle gap first — that single number decides whether a clamp-on lock will fit your door, and it is the one mistake worth avoiding.
How we choose
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of October 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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