For keyed exterior doors. Both knobs lock or unlock by key outside or turn button inside. All metal components. Solid steel latch assembly. Rust-resistant solid brass keyway for more security. Seamless 1-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 in Crossbore, 1 in Edge Bore, 1 in x 2-1/4 in Latch Face. Door thickness Fits 1-3/8 to 1-3/4 in doors. Cylinder 5-pin, removable, KW1 keyway, one piece solid brass, two nickel-plated, solid brass keys. Strikes of 1 in x 2-1/4 in. Bolt 1/2 in throw. 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 in square corner, radius corner or drive in applications, includes both square and 1/4 in radius corner strikes. 6-way universal.