Hammer Drive Pin Anchor Anchor Diameter 1/2 in Overall Length 4 in Anchor Material Steel Finish Zinc Plated Head Type Round Head Height 0.25 in Head Diameter 1 in Drill Bit Size 1/2 in Minimum Installation Depth 2 1/2 in Drive Pin Anchor Type Vibration-Resistant Drive Anchors Compatible Material Block Concrete Stone Material Grade/Class 1038 Removable Permanent System of Measurement Inch Manufacturer Location Globally Sourced Material Quality Standards ASTM E488