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. The Satin Chrome finish gives the product a modern and minimalist look. For use on exterior doors where keyed entry and security is needed Featuring SmartKey Security, which protects against advanced break-in techniques and allows you to re-key your lock yourself in seconds. SmartKey Security re-key technology is compatible with Kwikset (KW1) keyway or (SC1) keyway options Deadbolt operated by key outside and thumb turn inside Comes with 2 keys Latch has round corner faceplate Deadbolt Latch has 2 interchangeable faceplates - round corner and square corner ANSI/BHMA grade 3 certified Latch has adjustable backset 2-3/8" to 2-3/4" to fit all standard door preparations Collection Name: 660 Series Color/Finish Family: Chrome Hardware Finish: Satin Manufacturer Color/Finish: Satin Chrome Series Name: Security Type: Single Cylinder Backset Size: Adjustable Bore Size: 2-1/8-in Edge Bore Size: 1-in Fits Door Thickness: 1-3/8-in to 1-3/4-in ADA Compliant: No Commercial/Residential: Residential For Use with Entry Door: Yes For Use with Mobile Homes: No Keyway: KW1 Material: Zinc Number of Cylinders: 1 Package Quantity: 1 Re-Key Technology: SmartKey Security Grade: Grade 3 Style: Traditional Warranty: Limited lifetime CA Residents: Prop 65 Warning(s): No UNSPSC: 31161600