Stainless steel ground rod clamps provide a means of connecting ground wire to a ground rod/electrode connector. The set screw provided with the ground rod clamp helps tighten the connection for better conduction.Material:-Body: CF8M (316 SS)-Bolt: 316 SSCompliances: UL Listed for Canada and US (Standard 467)UL File Number KDER.E340519Canada UL File Number KDER7.340519Body 100% made in USA; bolt may or may not be of U.S. origin.