This steel constructed bracket is for use on top tracks with a width of 5/8 In. Comes complete with retainer screw and features a 3/8 In. diameter pivot hole. Fits Acme and similar styled doors. The bracket is inserted into the track and as the screw is tightened, it forces the bracket against the lip running the length of both sides of the track. It is adjustable by moving it back or forth to the best position.