Most deadbolts must be manually locked with a key, and are more secure, as they have a 1” throw on the deadlocking bolt. A deadbolt may be either a single cylinder or double cylinder. A single cylinder deadbolt will accept a key on the outside of the lock, and is operated by a thumbturn on the inside. A double cylinder deadbolt will accept a key on the inside, and outside of the lock
Emtek Deadbolts are distinctive hardware for fine homes, they have a solid brass cylinder, housing, collar, and rosette, hardened steel bolt, heavy gauge steel understrike and brass trim strike.
Halsco Grade 2 Deadbolts have a solid brass bolt with reinforced hardened steel roller, and 1⅞” hardened steel insert. They include a solid steel door frame strike plate, reinforced with 3” screws to protect against kick in attacks, and are UL/ULC listed, safety standards listed for 3 hour doors. They are available in single and double cylinder, as well as IC Core.
Halsco Grade 3 Deadbolts have a 1” throw, with concealed hardened pin steel roller to prevent cutting and sawing, solid steel door frame strike plate, reinforced with 3” screws for protection against kick in attacks and are UL/ULC listed.
LSDA Grade 2 Deadbolts have a massive 1” throw adjustable backset bolt with hardened steel rod to resist sawing, and a security strike with 3” long screws. They also have a rotating collar with inserts that resist wrenching, and are UL/ULC listed, safety standards listed for 3 hour doors. They are available in single and double cylinder, as well as IC Core.
LSDA Grade 3 Deadbolts are designed for standard duty residential exterior and interior doors which require a positive deterrent to forced entry. They have a full 1” throw deadbolt with hardened steel rod insert, and revolving cylinder collar that resists any attempts at twist-off.