Vertical Rod Hanger System of Measurement Inch Mount Type Vertical Screw Size 1/4 in Overall Length 3 13/16 in Material Steel Finish Zinc Plated Drive Type Socket Compatible Material Wood Compatible Rod Thread Size 3/8 In.-16 Drill Bit Size 1/8 in Minimum Material Thickness Not Applicable ICC Approved for Cracked Concrete No ICC Approved for Un-Cracked Concrete No Seismic Approved No Anchor Diameter 3/8 in Body Length 3 in Color Silver