Southwire 4 Piece 7 8 in Woodboring Ship Auger Drill Bit Quiet Air Compressors it's resistant to saltwater it's resistant to saltwater Power to grind: worlds first cordless grinder with corded performance Series Name N A Sub Brand N A Bit Type Ship auger bit Bit Length 18 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 Lifetime Set Individual Individual Package Quantity 4 CA Residents: Prop 65 Warning(s) No Brand Model Compatibility Southwire Bit Diameter (Inches) 7 8 in Screw tip draws bit through wood Polished and coated flutes increase removal of cutting material