The Design House Single Cylinder 2-Way Latch Deadbolt is finished in brushed bronze and designed for left or right hand doors. This is a single cylinder lock with a keyed exterior and a thumb-turn interior. This deadbolt fits the two most common backsets in the U.S.Once in place the bolt does not budge. With home security in mind the single cylinder accepts a key on one side of the lock but is operated by a turn-button knob on the other U.S.Oncs product is ANSI Grade-3 certified which means this deadbolt is rated for residential security.. Dimensions - 5.25 x 9.2cm x 6.4cm .. Item Weight - 0.4kg.