Deadbolt Locks & Deadbolt Lock Sets

Deadbolt Locks for Exterior Doors and Entry Hardware

Deadbolts are door locks built around a projecting bolt that extends into the door frame or strike. They are commonly used on front doors, side entries, garage entry doors, service doors, residential openings, and commercial doors where a dedicated deadbolt lock adds a separate locking point to the opening.

Single cylinder deadbolts use a keyed cylinder on the exterior side and a thumbturn or similar operating mechanism on the interior. Double cylinder deadbolts use keyed cylinders on both sides. One-sided deadbolts operate from only one side, while electronic deadbolts add keypad, electronic, or connected access depending on the model.

Deadbolt compatibility depends on backset, door thickness, bore preparation, latch or bolt design, strike preparation, cylinder format, trim dimensions, keyway, grade, and operating method. When replacing an existing deadbolt lock, matching the current door preparation can simplify installation and avoid unnecessary drilling or patching.

A deadbolt may be installed above a door knob or lever as a separate lock, incorporated into a coordinated entry hardware set, or used in a commercial opening with compatible frame hardware. Traditional round trim, square and rectangular profiles, decorative trim, low-profile designs, and commercial configurations are available across different deadbolt families.

Backset describes the distance from the edge of the door to the centerline of the lock preparation. If you are replacing an existing lock, use the door backset measuring guide to confirm the dimension before ordering. Related replacement hardware can include bolts, strikes, cylinders, thumbturns, trim rings, and mounting components.

Deadbolt Lock FAQs

What is a deadbolt lock set?

A deadbolt lock set is the complete deadbolt assembly used to secure a door. Depending on the model, it may include exterior and interior trim, the deadbolt bolt, strike, cylinder or thumbturn, mounting hardware, and related components. Included parts vary by product, so check the individual listing before ordering.

Which deadbolt is best for a front door?

Front doors commonly use single cylinder deadbolts with a keyed exterior and interior thumbturn. Other openings may use double-cylinder, electronic, one-sided, or commercial deadbolt configurations. The correct choice depends on the door, required access method, local code requirements, and the existing preparation.

Is a deadbolt the same as a door latch?

No. A standard latch is typically spring-operated and retracts when a knob or lever is turned. A deadbolt uses a solid bolt that is extended or retracted by a key, thumbturn, electronic mechanism, or other lock control. Some shoppers use the phrase “deadbolt latch,” but the locking component is technically a deadbolt bolt rather than a spring latch.

What should I measure before replacing a deadbolt?

Check the backset, door thickness, cross-bore and edge-bore preparation, bolt or latch faceplate shape, strike preparation, trim dimensions, cylinder or keyway when applicable, and the footprint of the existing lock. Matching the existing preparation can make a replacement deadbolt easier to install.