Hammer Drive Pin Anchor Set Anchor Diameter 1/4 in Overall Length 1 in Thread Size Not Applicable Thread Length Not Applicable Anchor Material Zamac Alloy Pin Material Steel Finish Zinc Plated Head Type Round Drill Bit Size 1/4 in Minimum Installation Depth 3/4 in Maximum Material Thickness 1/4 in Ultimate Tension Strength (4 000 psi Concrete) 726 lb Pin-Drive Anchor Type Metal Removable Nail Drive Anchor System of Measurement Inch Compatible Material Block Brick Concrete Stone