Emtek Assa Abloy | Ball Roller Catch Sets - Flat Black Ball catches are generally used on doors, but can be used in other applications. The way they work is simple: on the top of the door there is a hole drilled and a spring loaded ball is installed which slightly protrudes from the top of the door. On the jamb above a strike plate is installed much like a strike plate used on a regular door, but this strike has a small indentation to fit the contour of the ball rather than a hole for the latch. As the door shuts, the spring loaded ball rests in the indentation on the strike and keeps the door closed. Length: 2 1/8" Width: 1" Ideal for use closet or cabinet doors Also can be used on a double door set Includes Matching Screws and Strike Plate Solid Brass Construction Model: 8802FB