An assembly is set of manufactured parts or components that work together in unison as one mechanism or device. A catch or latch is a type of mechanical fastener that joins two or more objects or surfaces while allowing for their regular separation. A latch typically engages another piece of hardware on the other mounting surface. Catches range in complexity from flexible onepiece flat springs of metal or plastic, to multipoint cammed catches. Features. Roller Catch Assembly. Made with high quality material