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. The Satin Chrome finish gives the product a modern and minimalist look. This single cylinder, single-sided deadbolt can be used along with a keyed knob or lever for added security.