Dead bolt lock

Introduction Deadbolt is an economical, durable auxiliary lock which provides the security of a 1"(25mm) throw zinc die case deadbolt with a hardened steel roller insert. It can be keyed to pair with entrance bored lock to maximize security on exterior doors. Features Construction: * Internal components are zinc plated steel. * Exposed trim is either stainless steel or brass or steel. * Free turning cylinder trim prevents wrenching. Deadbolt: * Full one inch throw zinc die cast deadbolt with hardened steel roller insert to resist sawing. Cylinders and keys: * 5 pin tumbler mechanism easily removable for rekeying. * Solid brass cylinder plug, supplied with two nickel plated brass keys. Handing: * Fully reversible for right or left hand doors. Door Thickness: 30mm-45mm. Function: *Single Cylinder Deadbolt with inside thumb-turn. Deadbolt projected or retracted by use or key outside or inside thumb-turn. *Double Cylinder Deadbolt, deadbolt projected or retracted by key on either side. *Keyless deadbolt operated by thumb-turn inside only. This additional security mechanism can not be seen from outside, therefore when used with a door viewer, is far superior than the normal chain door guard. Backset: * Adjustable 2-3/8" or 2-3/4"(60mm or 70mm).