The insert lock assembly is made of zinc alloy. It is secured to a die-cast mounting housing. It can be used on wood, vinyl or aluminum doors. Used by HOUSE GUARD and a variety of other sliding patio door manufacturers 4-1/4 inch x 15/32 inch keeper Please refer to the line art drawing for dimensions and compare with your needs before ordering Hardware;Door Knobs & Lock Sets;door-lock-replacement-parts