Southwire 3 8 in High Speed Steel 11 Step Drill Bit Quiet Air Compressors link cord and mounting brackets link cord and mounting brackets meets IEC 60900 specification C70 special tool steel with induction hardened jaws and cutters Ergonomic dual Durometer molded soft comfort grip Molded in slip guards for added user protection Backed by the WIHA no hassle guarantee Sub Brand N A Number of Hole Sizes 11 Diameters of Holes Drilled 3 16 in to 7 8 in Shank Size 3 8 in Shank Type Round Material High speed steel Set Individual Individual CA Residents: Prop 65 Warning(s) No Split point self starting tip requires no pilot hole and penetrates faster Tri lobe shank reduced slippage and firm grim in the chuck Laser etched sizes for easy identification Double flute design for fast cuts and a true round hole every time