Spyder Stinger 14 Piece Assorted Woodboring Spade Drill Bit Set Whole Home Water Heater ) 44 Assembled Height (in ) 44 Assembled Height (in blade speeds two: 1444 and 3150 lin Series Name Stinger Sub Brand Stinger Bit Type Spade bit Bit Length 6 1 2 in Shank Size 1 4 in Shank Type Hex Material Black oxide coated HSS Case Type Soft Quick Change Yes For Use With Power tool For Use on Metal No For Use on Wood Yes Warranty 30 day Set Individual Set Package Quantity 14 CA Residents: Prop 65 Warning(s) Yes Brand Model Compatibility Universal Bit Diameter (Inches) Assorted 20x faster than conventional spade bits 10x more holes than conventional spade bits Spyder stinger(TM) automatically engages the work surface for no thrust drilling Unlike other spade bits with a self feeding thread point