Constructed of 6061 T6 aluminum. Matte, Type-III hard-coat anodized finish for rugged service. Mounting screw threads into a steel insert for additional strength. Works with snap hooks, MASH hooks, wire loops, push button swivels, or sling webbing (up to 1.25" wide). Limited rotation push button swivel socket prevents twisted slings. Weighs less than 1 oz.