Get this Schlage Double Cylinder Deadbolt - Satin Nickel for delivery. Deadbolt operates with a key on the exterior and a key on the interior. For use on exterior doors with glass panes or gates where additional security is needed. Maximum security deadbolt offers superior protection against attacks by crowbar, hammer, wrench, saw, lock pick, and kick-in. Lifetime limited mechanical and finish warranty. Coordinate with other satin nickel products. All metal chassis for strength and durability. Designed for standard door prep (fits existing pre-drilled holes). Universal latch adjusts to fit 2-3/8 in. or 2-3/4 in.. Fits 1-3/8 in. to 1-3/4 in. wood or metal doors. Includes assortment of strike plates. Mounting hardware included.