This Yale P1109PB Replacement Rim Cylinder comes in brass. Keyblank No.8 Supplied with two keys Rim Finish: Polished Brass Pack: Visi Pack 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. The tailbar can be cut to suit the thickness of the door.