Concrete Anchor Screw Anchor Diameter 1/4 in Screw Size 2 1/4 in Overall Length 2 1/4 in Thread Length 1 7/8 in Head Type Hex Head Width 0.3125 in Head Height 0.14 in Drive Type External Hex Material Steel Finish Stalgard Material Grade/Class Grade SW Removable Removable Compatible Material Block Brick Concrete Wood Drill Bit Size 3/16 in Screw Anchor Type Concrete Screw Anchor System of Measurement Inch Includes Not Applicable Maximum Material Thickness Not Applicable