Screw Anchor Anchor Diameter 1/4 in Screw Size 3 in Overall Length 3 in Thread Length 2 1/2 in Head Type Hex Head Width 0.4375 in Head Height 0.33 in Drive Type External Hex Material Steel Finish Zinc Plated Material Grade/Class Grade SW Removable Removable Compatible Material Concrete Drill Bit Size 1/4 in Screw Anchor Type Concrete Screw Anchor System of Measurement Inch Includes Not Applicable Maximum Material Thickness Not Applicable Minimum Installation Depth 1 in