Concrete Anchor Screw Anchor Diameter 1/4 in Overall Length 3 1/4 in Head Type Hex Drive Type External Hex Material Steel Finish Blue Ruspert Material Grade/Class Case Hardened Removable Removable Compatible Material Block Brick Concrete Wood Drill Bit Size 3/16 in Screw Anchor Type Concrete Screw Anchor System of Measurement Inch Tip Type Self-Tapping Body Length 3 1/4 in Package Quantity 100