The ShureDrive Drive Anchor is an all metal light duty, impact setting, interference fit anchor, designed for tamper resistant use in a variety of substrates such as concrete, stone, solid brick, solid block, hollow brick, hollow block and hollow slab.Hammer-in method makes installation quick and easy. Full expansion of the anchor is evident when the head of the expansion nail sits flush with the flange. Once fully set, the ShureDrive becomes tamper resistant. The anchor's large flange prevents pullout.