One-Piece Construction Withstands Higher Torque Loads Than Standard Quick-Change Bits. Exclusive TurboMax Tip Minimizes Walking And Delivers Faster Starts And Stays Sharp Longer. Made From Premium High Speed Steel With Black Oxide Finish For Added Corrosion Resistance. 1/4" Quick-Change Shank Is Designed To Work With Impact Drivers And Reduces Slipping In Standard Drill Chucks.