Key takeaways
- Standard homes, mechanical key: a single-cylinder Grade 1 or Grade 2 deadbolt.
- Households that lose keys or have many users: a keypad or smart deadbolt with individual codes.
- Buyers wanting higher pick and bump resistance: higher-security cylinders with restricted keyways, such as Medeco or Mul-T-Lock style products.
- Glass near the lock: consider a double-cylinder only with advice from a licensed locksmith or local code office, since it can slow escape in a fire.
For most front doors, a Grade 1 or Grade 2 single-cylinder deadbolt from a established maker such as Schlage, Kwikset, Yale or Medeco, installed with a long strike screws into the door frame stud, gives the biggest security gain per unit of effort; choose a smart deadbolt only if you want keyless entry and app control, and choose a double-cylinder model only after checking local fire and building rules.
Our top picks
As an Amazon Associate we earn from qualifying purchases at no extra cost to you.
Quick Answer: Which Deadbolt for Which Door
A deadbolt is only as strong as the door and frame around it. Reviewers and locksmith groups commonly note that many break-ins involve kicking the door, which splits the frame near the strike plate, rather than defeating the lock itself. So the deadbolt you buy matters, but the strike plate, the screws and the door matter too.
- Standard homes, mechanical key: a single-cylinder Grade 1 or Grade 2 deadbolt.
- Households that lose keys or have many users: a keypad or smart deadbolt with individual codes.
- Buyers wanting higher pick and bump resistance: higher-security cylinders with restricted keyways, such as Medeco or Mul-T-Lock style products.
- Glass near the lock: consider a double-cylinder only with advice from a licensed locksmith or local code office, since it can slow escape in a fire.
Understanding Grades
The American National Standards Institute and the Builders Hardware Manufacturers Association publish the ANSI/BHMA A156.5 standard, which grades cylinders and locks. Grade 1 is the most demanding, Grade 2 is mid-level and Grade 3 is the lightest. Makers often list the grade on the box or product page, so check it rather than assuming. A grade tells you the lock passed a set of cycle, strength and finish tests. It does not make a lock burglar-proof.
At a Glance: Representative Options
| Type / example | Best for | Key points from the makers | Limits |
|---|---|---|---|
| Schlage B60 series single-cylinder deadbolt | Plain mechanical security | Schlage lists ANSI Grade 1 for many B60 models; one-inch bolt throw is a common spec | Standard keys can be copied at hardware stores |
| Kwikset SmartKey Security deadbolts | Easy re-keying without tools | Kwikset lists re-key features and Grade options by model | Reviewers differ on how much resistance the cylinder offers against skilled picking |
| Yale Assure Lock series | Keypad or smart entry | Yale lists keypad, touchscreen and connected versions, with optional Wi-Fi or Z-Wave modules | Requires batteries; features vary by version |
| Schlage Encode / Encode Plus | Smart lock with Wi-Fi built in | Maker lists app control, codes and, on some models, Apple Home Key support | Needs a Wi-Fi network and battery maintenance |
| Level Bolt / Lock lines | Keeping the existing look of the door | Maker describes a compact design that works with your existing deadbolt hardware | Smart features depend on the model and your phone |
| Medeco high-security deadbolts | Owners wanting restricted keys and higher cylinder resistance | Maker lists restricted keyways and rated cylinders | Higher cost tier; installation by a locksmith is common |
Specific model numbers change over time, so confirm the current grade and features on the maker’s product page before buying.
Features That Actually Affect Security
Bolt throw and bolt material
The bolt throw is how far the bolt extends from the door edge. One inch is a widely listed figure for residential deadbolts. A longer throw reaches deeper into the frame. Some makers list hardened steel inserts in the bolt to resist sawing.
Strike plate and screws
The strike plate is arguably the most overlooked piece. Replace the short screws that come with many doors with screws long enough to reach the wall stud, which locksmith organizations commonly advise. A reinforced strike plate or a full-length door jamb reinforcement kit can add strength where the door tends to split.
Cylinder resistance
Pick resistance, bump resistance and drill resistance vary by product. Makers describe security pins, hardened plates and restricted keyways. Absolute claims are unreliable, so favor products with third-party grading and clear descriptions.
Single versus double cylinder
A single-cylinder lock has a thumb turn inside; a double-cylinder needs a key on both sides. Double-cylinder locks are sometimes used when glass sits close to the lock. They can slow exit during a fire, and some jurisdictions restrict them. Speak with a licensed locksmith or your building or fire authority before installing one.
Smart Deadbolts: Trade-offs
Smart deadbolts add keypads, app control, temporary codes and, in some models, auto-lock. The benefits are no hidden key, easy guest access and the ability to check lock status remotely. The trade-offs include batteries that must be replaced, possible connectivity problems and the need to keep firmware updated. Choose a model with a physical key backup or a way to power it from outside, such as a battery terminal, and replace batteries when the lock warns you. Strong, unique access codes matter: avoid birthdays and repeated digits.
Budget Tiers Without Prices
Budget tier
Entry mechanical deadbolts from major makers are often Grade 3 or Grade 2. They stop casual attempts but typically use standard keyways. Pair them with a good strike plate and long screws.
Mid-range tier
Grade 1 mechanical deadbolts and many keypad or Wi-Fi smart models live here. This tier suits most homes.
Premium tier
High-security cylinders with restricted key control, or smart locks with extra connectivity and design, sit here. They suit owners with higher concerns or multi-user needs.
Pick X If… Decision Table
| Pick this | If you… |
|---|---|
| Grade 1 single-cylinder mechanical | want a simple, durable lock with no batteries |
| Keypad deadbolt | often forget keys or have kids, relatives or cleaners |
| Wi-Fi smart deadbolt | want remote status and temporary guest codes |
| Retrofit smart lock | want to keep your existing exterior look |
| High-security restricted-key cylinder | want tighter control over who can copy a key |
| Strike plate and frame upgrade only | already have a decent lock and want better kick resistance |
Fit and Compatibility Notes
- Door thickness: most residential deadbolts fit doors roughly 1-3/8 to 1-3/4 inches thick; makers list the range and sometimes include extension adapters.
- Bore holes: a standard 2-1/8 inch cross bore and 1 inch edge bore are the common sizes.
- Backset: 2-3/8 or 2-3/4 inches are common; many locks adjust between them.
- Handing: deadbolts are generally reversible, but check for keypad orientation on smart models.
- Door material: hollow-core interior doors are not suitable for a front entry. Use a solid-core, steel or fiberglass door with a reinforced frame.
If you are unsure about installation, a locksmith or handyperson can usually install and align a deadbolt quickly, and correct alignment prevents bolt drag that wears the lock. Follow the manufacturer’s installation guide, and never alter a lock in a way the maker does not allow.
Alternatives to Consider
- Door reinforcement kits: metal plates for the jamb and latch side that strengthen the door where it usually fails.
- Security door hinges and hinge pins: help with outswing doors where hinge pins are exposed.
- Smart door sensors and cameras: do not stop entry but alert you, especially combined with a video doorbell.
Frequently Asked Questions
Is a Grade 1 deadbolt worth it over Grade 2?
Grade 1 meets the most demanding ANSI/BHMA tests, so it is generally the sturdier option. For many homes, a Grade 2 lock with a reinforced strike plate and long screws gives most of the practical benefit. Check each maker’s stated grade for the exact model.
Can a smart deadbolt be hacked?
Any connected device carries some risk, but the more common failures are weak codes, dead batteries and unlocked doors. Use unique codes, keep the app and firmware updated and choose makers that publish security updates.
Do I need a double-cylinder deadbolt?
Usually not. They are sometimes used near glass, but they can slow your exit in an emergency and may be restricted by local code. Ask a licensed locksmith or your local fire or building authority before installing one.
What is bump-proofing?
Bumping is a method of defeating pin tumbler locks with a specially cut key. Some makers add security pins or other features to resist it, and they describe these features on their product pages. No lock is completely immune.
How long should the strike plate screws be?
Locksmith guidance commonly suggests screws long enough to reach the wall stud, often around three inches. Longer screws give the frame more holding power during a kick attempt.
Should I replace a lock after losing a key?
If a key has gone missing, re-keying or replacing the cylinder is a sensible step, especially if the key could be linked to your address. Keypad models let you simply delete a code.
More from Amazon
Programs that pair well with the guide above. Offers and eligibility are set by Amazon and may change.
Free shipping on eligible items, Prime Video and more. Eligible new members can start with a free trial.
Start a Prime free trialAudiobooks and podcasts to listen to on the go. Eligible new members can start with a free trial.
Try Audible freeAd-free music streaming. Eligible new subscribers can start with a free trial.
Try Music Unlimited freeA free business account with business pricing and bulk-buying tools for work, shop or home office.
Create a business accountAs an Amazon Associate we earn from qualifying purchases.
