Features: Forged from premium 9341 steel, high hardness and good wear resistance. The drilling head is processed by quenching to ensure excellent performance. 135drill point adopts double relief angle design to achieve incisive cutting. 38large spiral angle design increases cutting chip flute. Standard 1/2 inch round shank for convenient and secure use. Good reliability, perfectly fit for cutting wood, metal and etc. Specifications: Condition: Brand New Material: 9341 steel Color: Shown as picture Shank Diameter: 1/2in Optional Drilling Diameter: 21mm Package Weight: Approx.215g(21mm) Package List: 1 * Twist Drill Bit Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.