Kwikset 665 Double Cylinder Two Sided Deadbolt in Satin Chrome

As the industry leader, Kwikset has provided trusted security for over 60 years and has become synonymous with security, peace of mind, style and innovation. The largest-selling deadbolt in America, the 600 series provides tough, effective protection at an affordable price. This double cylinder deadbolt is operated by a key on both sides. The Polished Brass finish adds to the traditional look and feel of the product and makes a classic statement.

Amazon.com

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