Concrete Anchor Screw Anchor Diameter 1/4 in Screw Size 1 1/4 in Overall Length 1 1/4 in Thread Length 1 1/8 in Head Type Flat Head Width Not Applicable Head Diameter 0.41 in Head Height 0.19 in Drive Type Phillips 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