Concrete Anchor Screw Anchor Diameter 1/4 in Overall Length 3 3/4 in Head Type Hex Drive Type External Hex Material Stainless Steel Finish Silver Ruspert Material Grade/Class 410 Removable Removable Compatible Material Concrete Drill Bit Size 3/16 in Screw Anchor Type Concrete Screw Anchor System of Measurement Inch Maximum Material Thickness 2 3/4 in Maximum Ultimate Shear Strength 760 lb Maximum Ultimate Tension Strength 600 lb Minimum Installation Depth 1 in