585-10221 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.-Ideal for drilling holes in thin materials such as mild steel, copper, brass, aluminum, plexiglass, wood, and laminates.-Cutting Edge Material: HSS.-Measurement Type: Fractional.-Packing Type: Carded.