Screw Anchor Anchor Diameter 1/4 in Overall Length 2 1/4 in Head Type Hex Drive Type External Hex Material Steel Finish Zinc Plated Material Grade/Class Case Hardened Removable Removable Compatible Material Concrete Drill Bit Size 1/4 in Screw Anchor Type Concrete Screw Anchor System of Measurement Inch Maximum Material Thickness 1/2 in Maximum Ultimate Shear Strength 2 680 lb Maximum Ultimate Tension Strength 1 025 lb Minimum Installation Depth 1 3/16 in Body Length 2 1/4 in