IDEAL Nailbiter 1 in Woodboring Ship Auger Drill Bit Washer Supply Line the square neck bites into Hex Shank the square neck bites into the wood to prevent spinning while you tighten the nut from the threaded end The trailer is DOT certified as an over the road pressure washer system 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 even through nail embedded lumber Dual induction heat treated ensures durability staying sharper longer Heavy duty lead screw designed for quick gripping and penetration power Re sharpen for extended tool life 7 16 In hex shank Full black oxide coating prevents rust Quick change shank design