585-15221 Features: -New SpeedPoint tip provides 6X faster initial penetration time than before, and eliminates the need for center punching.-Single-fluted cutting edge assures true round holes, and allows greater control with less vibration.-Brand Name: Unibit.-Cutting Edge Material: HSS.-Measurement Type: Fractional.-Packing Type: Carded.-Tool Shape: Tree - Step Drill.-Type: Step Drill Bit. Color/Finish: -Titanium Nitride finish causes less friction which increases speed and increases product life by 6X.-Finish: TiN.