585-10239 This item 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.