Kwikset 665 Double Cylinder Two Sided Deadbolt in Satin Chrome

Kwikset's Maximum Security deadbolt features a 5-pin, double-cylinder locking mechanism for optimal security. A 1-inch throw with a hardened steel insert prevents saw break-ins. This single cylinder unit is operated by a key on the outside and turn-piece on the inside of the door for easy locking. Adjustable for 2-3/8- and 2-3/4-inch backsets, Kwikset backs this product with lifetime mechanical and 5-year finish warranties. --Brian D. Olson