Rod Hanger System of Measurement Inch Mount Type Horizontal Screw Size 1/4 in Overall Length 1 in Material Steel Finish Zinc Plated Drive Type External Hex Maximum Load Capacity 622 lb Compatible Material Wood Compatible Rod Thread Size 3/8 In.-16 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