Features 9341 Steel Forging - Our drill bit is forged from premium 9341 steel, high hardness and good wear resistance. Good cutting performance - Good reliability, the twist drill bit fits perfectly with cutting wood, metal and so on. Practical Angle Design: The 135° tip adopts a double-angle relief design to achieve an incisive cut. The design of the 38° wide spiral angle increases the cutting of the chip groove. Hardening processing: The drilling head is machined by quenching to ensure excellent performance. 1/2 inch round shank - Standard 1/2 inch round shank for convenient and safe use. Specifications: Condition: Brand New Material: 9341 steel Color: shown as picture Shank diameter: 1/2 inch Optional drilling diameter: 16mm, 17mm, 20mm, 21mm Package weight: about 138g (16mm), 156g (17mm), 199g (20mm), 205g (21mm) Features: The 135° drill bit adopts dual discharge angle design to achieve an incisive cutting.The 38° spiral angle design with wide spiral angle increases the cutting chip groove.Forged from premium 9341 steel, high hardness and good wear resistance.Standard 1/2 inch round shank for convenient and safe use. is processed by temp. good reliability, perfectly suitable for cutting wood, metal and so on. 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 don't mind before ordering. Package List