Hammer Drive Pin Anchor, Anchor Diameter 1/4 in, Overall Length 2 3/8 in, Thread Length 3/4 in, Anchor Material Steel, Pin Material Steel, Finish Zinc Plated, Head Type Round, Drill Bit Size 1/4 in, Minimum Installation Depth 1 in, Maximum Material Thickness 7/8 in, Ultimate Tension Strength (4,000 psi Concrete) 1,300 lb, Pin-Drive Anchor Type Heavy Duty Nail-Drive Anchor, System of Measurement Inch, Compatible Material Concrete, Masonry, Manufacturer Location Made in USA