Features:_x000D_ 1. The drill bit is made of high speed steel and is durable._x000D_ 2. Head grinding edge, good drilling centering, high accurate, incisive cutting._x000D_ 3. Large groove design, large chip space and good chip discharge performance._x000D_ 4. The shank arc design makes it easier to clamp._x000D_ 5. Can be used to drill copper, iron, aluminum, steel and other materials._x000D_ _x000D_ Specification:_x000D_ Condition: 100% Brand New_x000D_ Item Type: Twisted Drill Bit_x000D_ Diameter: 13mm / 0.51in, 13.5mm / 0.53in (optional)_x000D_ Full Length: 180mm / 7.1in, 190mm / 7.5in (optional)_x000D_ Working Length: 98mm / 3.9in, 105mm / 4.1in (optional)_x000D_ Material: High Speed Steel_x000D_ Color: Black_x000D_ _x000D_ Package List:_x000D_ 1 * Twisted Drill Bit_x000D_ _x000D_ Note:_x000D_ 1. Please allow slight error due to manual measurement. Thanks for your understanding._x000D_ 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.