With over 70 years of experience, Kwikset is recognized as the industry leader in security, innovation, and design. The 600 series is America’s best-selling deadbolt, known for its effective protection at an accessible price. This single-cylinder deadbolt features easy operation with a key outside and a thumb turn inside, delivering both safety and convenience for homeowners. | Kwikset | | SmartKey Security Satin Nickel Metal Single Cylinder Deadbolt | Best Buy