Concrete Anchor Screw Anchor Diameter 1/4 in Overall Length 2 1/4 in Head Type Hex Head Width 0.31 in Head Diameter Not Applicable Drive Type External Hex Material Steel Finish Climaseal Material Grade/Class Low Removable Removable Compatible Material Block Brick Concrete Drill Bit Size 3/16 in Screw Anchor Type Concrete Screw Anchor System of Measurement Inch Maximum Material Thickness 1 1/4 in Maximum Ultimate Shear Strength 1 440 lb Maximum Ultimate Tension Strength 950 lb