Concrete Anchor Screw Anchor Diameter 1/4 in Screw Size 4 in Overall Length 4 in Thread Length 1 7/8 in Head Type Hex Head Width 0.25 in Head Diameter 0.31 in Head Height 0.14 in Drive Type External Hex Material Stainless Steel Finish Stalgard Material Grade/Class 410 Removable Removable Compatible Material Block Concrete Drill Bit Size 3/16 in Screw Anchor Type Concrete Screw Anchor System of Measurement Inch Includes Not Applicable Maximum Material Thickness Not Applicable