Keyed Double Cylinder Deadbolt delivers quality and security you can depend on. Operate the deadbolt mechanism by locking and unlocking with a key on the exterior and interior. deadbolt provides maximum security with its pick, pry and bump resistant. It features a 1-inch deadbolt, drill resistant and anti-saw pins, and an anti-pry shield. The deadbolt fits most standard doors measuring 1-3/8" to 1-3/4" thick. The deadbolt is easy to install and reversible. Mount on the left or right-handed doors for suitability. The adjustable latch is ideal for doors with 2-3/8" or 2-3/4" backsets. The keyed entry deadbolt meets ANSI Grade 3 standard requirements. The Double Cylinder Deadbolt and its simplistic style is the perfect addition to any home whether Youre replacing a damaged or worn out deadbolt or starting anew. Designed to provide additional security to your commercial or residential exterior knob, lever or handle set and is best used for the front, back and side doors.