IRWIN WeldTec 3 8 in Woodboring Auger Drill Bit Crawl Space Vents Solid Bit Capacity: 1 inch Solid Bit Capacity: 1 inch Grinding disc not included Series Name N A Sub Brand WeldTec Bit Type Auger bit Bit Length 17 in Shank Size 7 16 in Shank Type Hex Material High speed steel Case Type N A (no case) Quick Change Yes For Use With Power tool For Use on Metal No For Use on Wood Yes Warranty None Set Individual Individual Package Quantity 1 Bit Diameter (Inches) 3 8 in CA Residents: Prop 65 Warning(s) Yes Brand Model Compatibility All Aggressive screw pitch Patent pending welded cutting edge Wide flutes 7 16 In quick change impact shank