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. Stainless Steel Submerger Catch. Made with high quality materialSpecifications. Size 20. Length 1.35. Width 1.35. Height 0.4