Deadbolts b series - single cylinder heavy-duty residential/light-duty commercial"maximum security" boxed triple option universal latchbolt finish=satin chrome keying=k4. Satin chrome, single cylinder deadbolt, deadbolt thrown or retracted by key from outside or by inside turn unit, universal 2-3/8 inch to 2-3/4 inch backset, 1-3/8 inch to 1-3/4 inch door range, grade 1, ansi/bhma certified a156.5-2001, lifetime brass finish, box pack. For residential single and multifamily entrance doors. Deadbolt thrown or retracted by key outside, or by turn unit inside; bolt automatically deadlocks when fully thrown. 7/8 inch wrought brass trim ring reinforced with security inserts. Concealed spin rin g rotates to protect against wrenching the cylinder. Solid steel door frame reinforcer with 3 inch screws protect against kickin attack. Solid, 1 piece design protects against hammer and crowbar prying attacks. 21/2 inch steel adapter ring, plated to match, p rovided for accommodating 21/8 inch crossbore. Hands free installation. Door prep: 11/2 inch or 21/8 inch crossbore; 7/8 inch edge bore; 1 inch x 21/4 inch latch face. Door thickness: 13/8 inch to 13/4 inch. Cylinder: Solid brass, 5pin, tumbler c keyway wit
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