Used by Adam Rite, W and F and a variety of other sliding patio door manufacturers Can be used for a left or right handed door 2 Different mounting hole patterns to choose from (3-15/16 inch or 4-15/16 inch on center) Diecast construction with a black powder coat finish Tail piece is notched for easy break points to fit a variety of door widths (may need to be trimmed to fit your door)