Deadbolts

Choose between single-cylinder (key outside, thumbturn inside) and double-cylinder (key on both sides) based on security and egress needs; verify backset (typically 2-3/8" or 2-3/4") and door thickness compatibility, and consider ANSI/BHMA grading for durability and security performance

Look for a solid metal bolt (1" throw preferred), hardened steel strike plate and screws that extend into the frame, anti-drill/anti-pick cylinders, and an ANSI/BHMA grade indicating mechanical strength (Grade 1 is highest, Grade 3 is basic residential)

Deadbolts typically range from budget options under $50 to premium models over $200; many well-regarded residential deadbolts fall in the $50–$150 range, with average category prices around the mid-hundreds when considering locksets and smart features

Smart deadbolts add features like remote locking, keypad entry, or integration with home systems; verify power source (batteries or hardwired), compatibility with your smart home platform, encryption standards, and whether the lock retains manual key override in case of electronics failure

Many deadbolts are designed for DIY installation using a screwdriver, drill, hole saw and chisel; follow the template and instructions precisely, ensure alignment with the strike plate, and consider professional installation for reinforced frames or nonstandard doors

Lubricate the cylinder annually with a graphite or dry lubricant (avoid oil-based sprays), tighten mounting screws periodically, check that the strike plate and bolt align, and replace batteries promptly in electronic models to prevent lockouts

For keyed-alike systems, confirm that manufacturers can match keys across multiple locks and that key control policies meet your needs; for master keying in multi-user settings, work with a locksmith or provider to design secure key hierarchies and document key ownership