For keyed exterior doors. Both knobs locked or unlocked by key outside or turnbutton inside. All metal components. Solid steel latch assembly. Rust resistant solid brass keyway for more security. Seamless one-piece knob for extra strength. Square spindle for right or left handed installations. Easy installation. Cylinder drilled for construction keying. DOOR PREP: 2-1/8" Crossbore, 1" Edge Bore, 1" x 2-1/4" Latch Face. DOOR THICKNESS: Fits 1-3/8" to 1-3/4" doors. CYLINDER: 5-pin, removable, KW1 keyway, one piece solid brass; (2) nickel plated, solid brass keys. STRIKES: 1" x 2-1/4". BOLT: 1/2" throw. HANDING: Reversible for right or left hand doors. ANSI/BHMA: Exceeds Grade 3 Standards. 6-WAY ADJUSTABLE LATCH: Fits 2-3/8" to 2-3/4" square corner, radius corner, or drive-in applications; includes both square and 1/4" radius corner strikes.