IDEAL Nailbiter 1 in Woodboring Ship Auger Drill Bit Gunmetal easy install upgrade to your home’s Porch Lights easy install upgrade to your home’s safety such as plywood or concrete slabs or wherever heat is desired Series Name Nailbiter Sub Brand N A Bit Type Ship auger bit Bit Length 7 1 2 in Shank Size 7 16 in Shank Type Hex Material High speed steel Case Type Hard Quick Change No For Use With Power tool For Use on Metal No For Use on Wood Yes Warranty 90 day limited Set Individual Individual Package Quantity 1 CA Residents: Prop 65 Warning(s) No Bit Diameter (Inches) 1 in Brand Model Compatibility N A Nailbiter premium dual helix construction Twin cutting edges for fast and smooth drilling