The Belt Keeper Catch Adapter is made of 5625 Mil-Spec 1 tubular nylon, and a 1 female National Molding side release buckle and D-ring to be installed on a duty belt with standard belt keepers. The Belt Keeper Catch Adapter is used as a weapons catch to secure the front of any weapon to your off hand shooting side when using one of the URBAN-SENTRY male sling adapters while in single point mode.