Expansion Shield, Anchor Diameter 1/2 in, Overall Length 1 1/4 in, Screw Size 1/4 in, Thread Size 1/4 In., Thread Depth 1.25 in, Thread Type Coarse, Material Zinc Alloy, Finish Plain, Drill Bit Size 1/2 in, Minimum Installation Depth 1 1/4 in, Ultimate Shear Strength (4,000 psi Concrete) 2,100 lb, Maximum Ultimate Shear Strength 2,100 lb, Ultimate Tension Strength (4,000 psi Concrete) 2,320 lb, Maximum Ultimate Tension Strength 2,320 lb, System of Measurement Inch