Replacement Rim Cylinder | 1109 2x Keys Polished Brass Bump Resistant Replacement rim cylinder for use with night latches Provides key access from one side of the door Suitable for doors 38-57mm thick Yale Brass Plated Metal Single Rim Cylinder Door Lock | 1109 The Yale 1109 series replacement rim cylinders are for use with surface mounted locks, such as nightlatches, operating from a tailbar. They are used to provide key access from one side of a door and are suitable for doors 38mm to 57mm in thickness.