Suggested Retail:$17. Kwikset 660 Series Satin Nickel Single Cylinder Deadbolt Featuring SmartKey Security. 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 crisp, clean appearance of the Satin Nickel finish adds to the overall look of the product and brings a modern feel. This single cylinder deadbolt can be locked or unlocked by a key on the outside, or the turn button on the inside. SmartKey Security re-key technology allows you to control who has access to your home. Rekey the lock yourself in seconds in 3 easy steps. Have you recently moved or had a child lose a key. It’s time to re-key. SmartKey Security provides the highest level of residential security and features Bump Guard to protect against lock bumping.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. PAID DELIVERY AND 7 DAY ALTERNATE PICK-UP ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.