Rod Hanger System of Measurement Inch Mount Type Vertical Screw Size 1/4 in Overall Length 3 in Material Steel Finish Zinc Plated Drive Type External Hex Maximum Load Capacity 2 275 lb Compatible Material Wood Compatible Rod Thread Size 1/2 In.-13 Drill Bit Size Not Applicable Minimum Material Thickness Not Applicable ICC Approved for Cracked Concrete No ICC Approved for Un-Cracked Concrete No Seismic Approved No Anchor Diameter 1/4 in Manufacturer Location Made in USA