For hall and closet and all interior doors where a simple latch is all that is required. Both Colonial style knobs always free, no locking mechanism. Door prep 2-1/8 in cross bore, 1 in edge bore, 1 x 2-1/4 in latch face. Backset of 2-3/8 in standard and adjustable to 2-3/8 to 2-3/4 in optional. Thk doorness 1-3/8 to 1-3/4 in. Cylinder 5-pin. Faceplate 1 x 2-1/4 in. Strike of 2-1/4 in full lip. Bolt 1/2 in throw. Reversible for right or left hand doors. ANSI/BHMA Grade 3.