Bethpage Deadbolt, Single Cylinder, 2-1/8" Door Prep Solid forged brass Low profile cylinder deadbolt for 2.125" door prep Features 0.5" low profile cylinder projection Deadbolt case is formed of heavy gauged steel for strength most interior parts are made of solid brass Specially-designed reinforcing strike constructed of high-grade steel 5-pin keying cylinder Accommodates 1.75" thick doors and 2.125" diameter cut outs. Deadbolt kits are available for 2" and 2.25" thick doors. ANSI/BHMA A 156.13 Operational & Security Grade I 8237-050