Hex Shank Step Drill Bit, Twist Drill M35 Cobalt High-Speed Steel 2-Piece Set

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[6.35mm Hex Shank]: The step drill features a 6.35mm hex shank for a secure grip and effective anti-slip performance. 4-20mm (9 steps): 4-6-8-10-12-14-16-18-20mm. 4-12mm (9 steps): 4-5-6-7-8-9-10-11-12mm.
[High-Quality M35 Material]: Made from M35 cobalt alloy, it boasts excellent hardness and wear resistance. The M35 alloy material ensures the drill bit's durability and stable performance.
[Titanium Aluminum Nitride Coating]: Utilizes a titanium aluminum nitride coating for superior wear and corrosion resistance, enhancing the step drill's durability. This special coating reduces friction, extending the drill bit's lifespan while maintaining stable cutting performance.
[Double-Edge Design]: The step drill employs a double-edge design to improve cutting efficiency and increase flexibility. The 75° spiral edge and 118° X-type drill bit prevent slippage, enabling faster drilling and precise cutting.
[Compatible with Various Materials]: This step drill is designed to work with a wide range of materials, including wood, metal, and plastic. It is suitable for high-hardness materials such as aluminum plates, steel plates, stainless steel plates, carbon steel, stainless steel plates under 1mm thick, and iron or aluminum plates under 3mm thick.