Step up to designer styles and superior security with Kwikset Signature Series products. The 980 deadbolt series is both tough and attractive. This single cylinder deadbolt can be locked or unlocked by a key on the outside, or the turn piece on the inside. The crisp, clean appearance of the Satin Nickel finish adds to the overall look of the product and brings a modern feel. Bacteria can double every 20 minutes on an unprotected surface. Microban silver glass technology is incorporated during the manufacturing process and permanently binds the silver ions to the coating. Treated hardware continuously inhibits the growth of bacteria on the surface creating a cleaner product.