IRWIN 4 in 6PC Drill Bit Set Miter Saws All ball bearing construction for durability All ball bearing construction for durability and longer tool life 1 in Product Length (in Series Name N A Sub Brand SPEEDBOR Bit Type Self feed bit Bit Length 4 in Shank Size 1 4 in Shank Type Hex Material High speed steel Case Type Hard Quick Change Yes For Use With Power tool For Use on Metal No For Use on Wood Yes Warranty None Set Individual Set Package Quantity 6 Brand Model Compatibility Universal CA Residents: Prop 65 Warning(s) Yes Bit Diameter (Inches) Assorted and bit identification is simple with easy to read size markings