Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsFor most exterior doors, the “door bolt” to compare is a deadbolt: an auxiliary lock used alongside other door hardware. The best choice depends on how the door is used, how occupants need to exit, and whether the lock fits the door and frame. This guide covers residential exterior-door deadbolts—not bolts for gates, sheds, or interior doors.
Which type of deadbolt is right for your door?
Deadbolts commonly come in single-cylinder, double-cylinder, and electronic versions. Their operating differences matter as much as their security features. Choose for the particular door and its occupants rather than treating the types as interchangeable.
| Type | How it operates | What to consider |
|---|---|---|
| Single-cylinder | Key outside; thumb turn inside. | Allows straightforward operation from inside. If a door has nearby glass that could provide access to the thumb turn, consider the layout and relevant safety requirements rather than assuming this type suits every door. |
| Double-cylinder | Key required on both sides. | May suit a particular outside-access concern, but occupants need a key to exit. That can delay emergency egress; check applicable local requirements and consider who uses the door. |
| Electronic | Code-based operation. | Can provide everyday access without using a physical key. Features and behavior vary by model, so verify the manufacturer’s instructions for power, backup access, and operation before buying. |
BHMA describes these common deadbolt types and advises choosing hardware appropriate to the door and use. See its locksets and deadbolts guidance and security overview.
How do you know whether a deadbolt will fit?
Measure and identify the door before selecting a model. A lock that does not fit or align can be difficult to operate and may not perform as intended. Use the product instructions for the exact compatibility requirements; do not assume that a standard-looking lock fits every door.
#1 Best Overall
- KEYED DEADBOLT: Use on doors requiring a high level of security, turn piece interior locking, exterior locking using a key. Recommended for exterior-facing doors
- SMARTKEY SECURITY: Kwikset’s SmartKey Security technology protects against advanced break-in techniques and allows you to re-key your lock yourself in seconds
- EASY INSTALL: Do it yourself, installs in minutes with just a screwdriver, all the hardware you need is included for a hassle-free installation, detailed directions provided
- FITS STANDARD DOORS: Fits standard size doors 1-3/8" to 1-3/4" thick, latch backset adjusts to either 2-3/8" or 2-3/4" with just a twist during installation
- ADJUSTABLE LATCH: With just a twist during installation, the latch backset can be adjusted to either 2-3/8" or 2-3/4" in order to fit all standard door preparations
- Door type and intended use: Confirm the product is designed for that door and location.
- Door thickness: Record the actual thickness and compare it with the manufacturer’s stated range.
- Backset: Measure the distance from the door edge to the center of the lock preparation, then match the product requirements.
- Handing and preparation: Check whether handing matters and whether the existing holes and other lock preparation suit the model.
- Instructions: Follow the manufacturer’s installation and fit guidance, including any requirements for the door and frame.
What does certification tell you?
ANSI/BHMA A156.40-2025 is the identified current edition of the Standard for Residential Deadbolts. Its listing says it establishes requirements for residential deadbolts and deadlatches, including durability, security, and finish tests. BHMA’s consumer certification guidance explains that certified hardware is evaluated in those areas. For a specific model, check its current product label or the BHMA directory rather than assuming certification from the brand or product category.
Testing is useful for comparing hardware, but it is not a guarantee that a door cannot be defeated. The ANSI Webstore listing for A156.40-2025 cautions that results in actual use vary with installation, door and frame construction, maintenance, and environmental conditions. ANSI’s door-locking standards information likewise notes that locks can be defeated or bypassed and that no lock alone provides complete security.
Rank #2
- Home Security, Sturdy Door Reinforcement Lock: 3" Stop metal home security door lock with 8 screws, including 4 long and 4 short, so you can choose according to your needs; The door latch lock can withstand a force of 800 lbs, which is 12 times stronger than a normal deadbolt, providing effective protection against forced entry. Front door lock makes you feel safe during the day or at night, enabling more relaxed rest; WINONLY door lock is an ideal choice for enhancing your home security
- Check Door Fit Before Purchase: Before buying, please measure your door to ensure compatibility. The WINONLY Door Reinforcement Lock fits inward‑opening single doors that are flush with the frame, have a gap over 0.07", and a drillable frame. Not for outward‑opening, double, or non‑flush doors, gaps under 0.07", or undrillable frames. Measure first for the best fit and security
- Easy to Install, Easy to Use: With a power screwdriver and drill, you can install the door safety lock on the door frame within 5 minutes; The metal reinforcement door lock comes with an installation manual for your reference during the installation process; When the door is locked, reach out and press the upper and lower grooves of the reinforced door lock and pull horizontally to the fully unlocked state to unlock; This ensures quick unlocking in any situation, helping prevent accidents
- Childproof Lock Providing Peace of Mind: Reinforcement lock for front door features a child safety protection function; Door security lock unique spring-loaded design prevents children from opening the door to strangers; Door lock for door safeguards your children from potential dangers such as the streets or pools when you're away or occupied; And for the elderly or women living alone at home, door lock reinforcement also provides an additional sense of security, making people more at ease
- Gift Ideas, Professional Service: The inward door lock is a unique, useful gifts for your family and friends, offering them security and peace of mind; The WINONLY customer service team will ensure that you have a satisfying shopping experience; If you have any questions during the purchase or use of our door locks, please feel free to contact us; With their professional insight and experience, our customer service team is dedicated to delivering tailored advice and solutions for your needs
Why the door, frame, and strike matter
A deadbolt is only one part of the door assembly. The bolt must align with the strike, and the strike, jamb, and door all affect how the installed hardware works. HUD’s Home Security Book Three: Choosing a Good Lock discusses deadbolt and strike configurations; because it is an older guide, use it alongside current product instructions and the current standard listing.
Do not assume that a longer bolt, aftermarket strike plate, or reinforcement kit by itself makes an entry secure. If the door or frame is damaged, unusual, or difficult to assess, ask a qualified locksmith or security professional to evaluate the complete installation. Any replacement or reinforcement hardware must be compatible with the actual door and frame.
Quick Recap
Best Value
- Enhanced Security Keyed Deadbolt: Each lock includes 2 keys. Constructed with a heavy-duty brass lock cylinder and precision latching mechanism, this door lock provides reliable protection for your front door, garage, office, and back doors. Cannot Be Rekeyed
- Built to Last: Certified to ANSI Grade 3 standards. The lock body is crafted from solid stainless steel and features anti-bump and anti-pick protection. Rigorously tested for reliable operation through 250,000+ open-close cycles
- Fits Door Thickness: 1-3/8" to 1-3/4" (35mm to 45mm); Adjustable Backset: 2-3/8" or 2-3/4" (60mm or 70mm); Fits 2-1/8" (54mm) door hole; Lock faceplate base diameter: Φ2.56" (65mm)
- 10-Minute Installation: Includes a step-by-step illustrated manual and all required mounting hardware—No professional tools or locksmith needed
- Lifetime US Customer Support: Includes a 1-year limited warranty, plus a free 1-year extension with product registration (2 years total). US phone support is available Mon–Fri 9 AM–5 PM and Sat 7 AM–3 PM PST, and 24/7 email support is available from the Veise support team
Rank #4
- Passcode Entry: This keypad lock offers 20 access codes for family use and a temporary code for single-use guest entry
- One-Time Code: A one-time PIN code can be set for door opening and will automatically be deleted after use
- Smart Locking: Features an automatic door lock that can be set to lock in 10-99 seconds (off by default) and one-touch auto-lock by pressing and holding any key on the keypad for 2 seconds
- Long Battery Life & Low Battery Indicator: Powered by 4 AA batteries (not included), lasts up to 365 days. A red light indicator alerts you when battery level drops below 15%
- Security Deadbolt: Provides reliable home protection with its sturdy aluminum alloy construction, weather resistance (IP54), durability, anti-peeping user code protection, low battery indicator, and solid lock cylinder
Rank #3
- FUNCTION:Keyed entry lock,with 3 brass material nickel plated keys, KW1 keyway,5 pins brass cylinder,used for exterior or interior door where security is needed. Used on doors requiring a high level of security, operated by key outside and thumb turn inside. Recommended for exterior-facing doors.
- HIGH QUALITY AND SECURITY：Stainless Steel deadbolt is anti-rust, durable. Solid zinc alloy latch bolt available for high quality,exceeds 250,000 cycles.
- FITS STANDARD DIMENSIONS: PATENT Adjustable latch with backset 2-3/8" or 2-3/4"(60mm or 70mm), thickness of 1-3/8" to 1-3/4" (35mm to 45mm), to fit all standard doors.
- EASY INSTALLATION: Do it yourself, installs in minutes with just a screwdriver, all the accessories you need included.
A practical selection checklist
- Identify the exterior door’s use and who must be able to operate it.
- Choose the operating style with egress in mind: key and thumb turn, key on both sides, or a code-based model with verified operating and backup behavior.
- Measure door thickness and backset, and check handing and existing lock preparation against the manufacturer’s requirements.
- Compare current certification or tested-performance information for the exact product; treat it as evidence about the hardware, not a guarantee about the whole entry.
- Inspect the door, frame, and strike condition. Follow installation instructions, and get professional help when fit or condition is uncertain.
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.
