As the industry leader, Kwikset has provided trusted security for over 70 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 single-cylinder deadbolt is operated by a key on the outside or a thumb turn on the inside. Specifications: Dimensions (Overall): 9 inches (H) x 4.4 inches (W) x 3.65 inches (D) Weight: 1.06 pounds Material: Metal Power Source: Manual