Carbine LB3 Key/Turn Deadbolt - Satin NickelThis is a KEY TURN deadbolt or SINGLE. This means there is a turn snib on the inside. The Carbine residential series of surface mounted deadbolts provides installers and users the strength, versatility, and various finishes to suit both function & style. With its easy installation, multiple finishes, and single or double cylinder models, the Carbine residential grade of surface mounted deadbolts will complement existing or new doors. Tested to