A replacement butterfly catch for a hard case, the twist-to-lock type used on guitar, bass and keyboard cases. It comes complete as two screw-on pieces, the spring-loaded catch body with its twist dial and the separate hook plate it grabs, in a silver anodised finish. Measure your old catch and its screw spacing before ordering, as case latches come in several sizes. AMS describe it simply as a strong metal catch. Part number CPA19.