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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsThe right French-door lock depends on the door pair, not just the product label. A complete setup must secure both the regularly used active leaf and the inactive leaf, and it must match the doors’ material, preparation, dimensions and operation. The options below are manufacturer examples—not a tested ranking—so check the exact model and configuration before buying.
What hardware does a French-door pair need?
One leaf is the active leaf, opened and closed in normal use; the other is the inactive leaf. A lock on the active leaf alone does not necessarily retain the inactive one. A common arrangement combines an active-leaf handle and lock with top and bottom flush bolts, or uses a compatible system that secures the passive leaf as part of its operation. [FrenchDoors.com guide]
Before choosing a product, identify how the pair is built: whether it has a floating mullion, a fixed meeting stile, or another arrangement can determine which passive-leaf mechanism will work. Confirm the strikes or keeps and the head jamb and threshold can accept the intended locking points.
Which French-door lock types should you compare?
Flush bolts for the inactive leaf
Flush bolts are manually operated or integrated bolts that retain the inactive leaf by engaging the head jamb and threshold. The FrenchDoors.com guide identifies the Ives by Schlage 261B5 and describes using a bolt at both the top and bottom. It is an accessory, not a complete lock for the pair; confirm the door can accept it and that the strikes align. [FrenchDoors.com guide]
#1 Best Overall
- All-Metal Construction: Made of hardened steel, offering superior durability and load-bearing capacity compared to traditional plastic version. It effectively prevents door handle manipulation (to stop unauthorized entry/exit) and resists forced kicks from the outside.
- Adjustable Design: Features an adjustable sliding lock bar to fit door handles at different spacings. Compatible with standard French double-door with round door knobs, lever door handles.
- Applicable to both outswing & inswing French double doors.
- Storage Pouch & Key Tag Included: A waterproof storage bag is included for easy organization. It can also be used to hang the device on the door handle or door stop for quick access. Key tag help quickly distinguish keys.
- U-Bracket Design: The 1-3/8" opening accommodates the neck of most double-door knobs/levers for secure locking. Also compatible with tubular handles under 1-3/8" diameter, including: barn doors, gate, double-door refrigerators.
Multipoint locks
A multipoint mechanism engages more than one point along a door edge. ERA’s French-door system is specified for flush French timber doors and has a 45 mm backset. Its leaflet lists forged hooks and a central deadbolt, with optional shoot bolts; ERA describes the primary lock engaging a passive mechanism. The leaflet also specifies a 22 mm central deadbolt throw and a 10-year mechanical guarantee. These are manufacturer specifications, not independent comparative results. [ERA product information]
ERA’s product leaflet states: “Suitable for securing flush French timber doors.” That suitability claim is specific to the described system and door type; it does not establish fit for every French-door pair.
Passive-leaf locks and shoot bolts
Yale describes its French Door YS170 for systems with a floating mullion. It drives shoot bolts into the top and bottom of the frame to secure the inactive leaf. Yale lists 35 mm and 45 mm backset variants and a PZ92 mm center case. The same product page specifies a 50,000-cycle endurance test and a 10-year mechanical guarantee; those figures are manufacturer claims, not evidence of superiority over other products. [Yale YS170]
Rank #2
- [Sturdy and Durable Double Door Lock]: This double door lockout device is made of diecasted aluminum alloy with unibody design, it is a high quality solution as double door lock with key and french door lock, 3 keys are included for internal use or external use. It provides extra security not only as door barricade but also double door security device.
- [Suits for Knobset and Handleset]: This dementia door lock for double door and french door as double baby proof double door handle lock, is designed with bigger range of adjustment, it suits most of knobset and some handleset with tighter locking, locking status indications are presented clearly. It can be used as a portable door lock, removeable door lock and no drilling lock without any installtion.
- [Perfort for Indoor Use and Also Workable for Outdoor use]: The double door lock for kids safety can be a perfect solution of extra lock for door from inside, because of the cylinder and keys, it can provide additional security for burglar proof door lock (remark: it can not replace the normal handleset or knobset from safety point of view). It is like a smaller but strong double door barricade security bar.
- [Bigger Range of Locking Adjustment]: Please verify the dimension before placing order. Thought the lock has big range of adjustment to suit most double door lock set, still please check your french door lock, bifold door lock, closet locks for double doors and double door locks for front door or double door lock for interior french doors.
- [Quality Service]: Worry-free return policy (30 days) and 24/7 email support, welcome to contact us for any problem during lifetime of this double door barricader and kid proof double door lock.
Single-point deadbolts and mortise locks
A deadbolt secures one point. A mortise lock has a case recessed into a pocket in the door edge and can combine latch and deadbolt functions. These architectures may suit some prepared doors, but they are not interchangeable with multipoint systems without checking the door edge, existing pocket and hardware. In either case, verify how the inactive leaf is retained; securing one leaf at one point does not by itself secure the pair. [FrenchDoors.com guide]
Hinge-side supplemental retrofit
ABUS presents the TAS112 as a supplemental retrofit for compatible French doors. ABUS states that it has VdS and DIN certification and more than one tonne of load resistance. The manufacturer specifies a rebate range of 0–30 mm and a maximum door opening of 90 degrees. These limits and claims apply to that product; check the exact door geometry and whether the restricted opening suits the household. [ABUS TAS112]
How do you choose between the options?
Use the locking arrangement that matches the door pair and its existing preparation. The examples below describe different roles and configurations, not equivalent products in a performance contest.
Rank #3
- Flush bolt can be used to secure the opening for composite door, French, patio, wood, double or other doors. This great small device features automatic holding spring to provide tension for both retracted and projected positions. It often be installed on inactive leaf of double door opening (top and bottom) to offer safety function.
- Our flush bolts are all machined from solid stainless steel for anti corrosive and rustproof, heavy duty and sturdy. Installing a flush bolt to make a nice addition to security of your home.
- Size : Length=6"(15cm), Width=0.79"(2cm), Depth = 0.67"(1.7cm). The interior part of the flush bolt is reinforced by screws to enhance stability and fluency of the structure. Install on inactive leaf of double door opening.
- Integrated design of the switch is easy for daily use, Say goodbye to the one with "push just ride and slide" type, this lever type with comfortable touching and concealed style will surely offer you enjoyable usage and match your modern decoration.
- Easy to install,comes with rust-proof screws and surface strikes for installation. Constructed from stainless steel, screws will provide extra strength to engage and interlock firmly so as to be immobile.
| Option | Role or locking points | Compatibility details stated by manufacturer or guide | Important check |
|---|---|---|---|
| Flush bolts, including Ives by Schlage 261B5 | Retain the inactive leaf at the top and bottom | The guide recommends one top and one bottom; it does not state a universal material or dimensional fit. | Confirm bolt, strike and door preparation fit. |
| ERA French-door multipoint system | Hooks and central deadbolt; optional shoot bolts; primary lock engages a passive mechanism | Flush French timber doors; 45 mm backset | Check exact system, handing and door preparation. |
| Yale YS170 | Passive-leaf shoot bolts into top and bottom of frame | Floating-mullion system; 35 mm or 45 mm backset; PZ92 mm center case | Confirm mullion arrangement and measurements match the variant. |
| Single-point deadbolt or mortise lock | One locking point; mortise case sits in the door edge | Guide describes the general architectures; it does not establish a specific French-door product fit. | Check existing pocket and how the inactive leaf is secured. |
| ABUS TAS112 supplemental retrofit | Additional hinge-side restraint | Rebate 0–30 mm; maximum opening 90 degrees; ABUS states VdS and DIN certification | Verify rebate, opening needs and exact door compatibility. |
Another Yale option, the Lockmaster, is specified by Yale with a minimum 100,000-cycle operational lifespan and BS EN 1670:2007 Grade 4 corrosion resistance. Those figures are manufacturer specifications for that product, not a directly comparable test against the YS170 or ERA system. [Yale Lockmaster]
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What should you measure before buying?
Product names such as “French door lock” do not establish fit. Record the existing configuration and compare it with the exact manufacturer variant and its installation information.
- Mark the active and inactive leaves, and note whether the pair uses a floating or fixed mullion.
- Identify door material, frame/profile, handing and whether the door opens inward or outward.
- Record the existing faceplate, lock model and door-edge preparation, including any mortise pocket.
- Measure backset and center-case/PZ spacing; check the faceplate and case dimensions against the replacement.
- Locate existing strike or keep positions and confirm the jamb and threshold can accept any new locking points.
- Check that the selected mechanism’s operation is practical for daily use and does not compromise safe egress or local requirements.
Dimensions are model-specific: Yale lists 35 mm and 45 mm backsets for the YS170, while ERA specifies a 45 mm backset for its French-door system. Do not transfer a measurement from one product to another. For a complex replacement, follow the manufacturer’s installation information or consult a qualified door-hardware professional.
Rank #4
- For indoor and outdoor use; padlock with key is best used for backpacks, briefcases, tackle boxes, lockers and storage locks
- Padlock features a black vinyl-covered aluminum body that is scratch and corrosion resistant and a hardened steel shackle for cut resistance
- 5-pin cylinder and dual locking lever mechanism provides extra pick and pry resistance
- 2 in. wide lock body; 5/16 in. diameter shackle with adjustable 2-3/8 in. to 5-15/16 in. length, 1-1/32 in. width; extended shackle length for application flexibility
- One padlock, two keys (matching color key head for added convenience)
How should you interpret security and certification claims?
Multipoint engagement, deadbolt throw, cycle endurance and corrosion resistance describe different aspects of hardware; none alone proves that a lock is the strongest choice for a particular door. Manufacturer specifications and certifications apply to the stated model and configuration. They do not establish how the complete door, frame, keeps and installation will perform as a system.
The available product information does not provide controlled, independent comparative testing across these options, so there is no substantiated overall winner. Compare the leaf or leaves secured, locking points, fit, installation needs, operation and any certification claim for the exact variant and market. Availability and specifications can change; check the manufacturer’s current product page before purchase.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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