For use on interior hall or closet mobile home doors where a simple latch is all that is required. Both bell-shaped knobs always free, no locking mechanism. 7/8 in edge bore. Door Prep: 2-1/8 in cross bore, 1 x 2-1/4 in latch face. Backset: 2-3/8 in standard and adjustable 2-3/8 in and 2-3/4 in optional. Door Thickness: 1-3/8 to 1-3/4 in. Cylinder: 5-pin. Faceplate: 1 x 2-1/4 in. Strike: 2-1/4 in full lip. Bolt: 3/8 in throw. Handing: Reversible for right or left hand doors. ANSI/BHMA: Grade 3.