Material: 4341 high speed steel, made of high speed steel (HSS), high hardness, anti-rust, long service life. Size: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5. 6 size combinations to perfectly meet your different needs The sharp drill bits, after induction hardening treatment, resist slight induction wear, ensuring punching speed and improving work efficiency. Drilling, tapping, deburring and countersinking can be done at one time, saving processing steps and time costs, and improving work efficiency. 6 steel drill bits, suitable for drilling wood, plastic, fine copper, aluminum and other soft metals (5-6mm), not suitable for hard materials (such as metal plates) steel). When drilling, it is necessary to inject water to cool the drill bit at the same time. This will help you add value to your practice. If the drill bit cannot be cooled during drilling, the drilling speed should not be too fast, and the drilling should not be too frequent. feature: Drilling, tapping and deburring/sink face. For wire, aluminum Advantages are drilling, tapping and chamfering. Can save processing steps and time costs, improve efficiency< /p> Beveled by the tap to prevent the thread from being damaged by excessive drilling. this Its helical groove, inside the transition line, is cut out and the thread is applied in the threaded through hole Specification: silver Bevel angle: 90 Shank: 1/4" (6.35mm) Hex Shank Material: 4341 High Speed Steel Surface Treatment: Titanium Plating < p>size: M3x0.5: Total length: 54mm M4x0.7: Total length: 55mm M5x0.8: Total length: 56mm M6x1.0: Total length: 57mm M8x1.25: Total length: 59mm M10x1.5: Length total: 60mm Notes: Please add oil before using the faucet, which will make the operation smoother and prolong the life of the faucet. faucet life. Application: 4241 high speed steel is suitable for low hardness materials such as wood, aluminum, aluminum alloy, etc., and the thickness of the material is 3-5mm Package Included: 6 Hex Shank Drill Bits