
China 3xd Solid Carbide Drill Bits for Hardened Steel. Solid Carbide Material: Made of Tungsten Cobalt Alloy for high toughness and durability. Wide Hardness Range: Suitable for materials from HRC45 to HRC65 including hardened steel. Customized Size Accepted: Customized tools can be provided according to your drawing and work piece. Multiple Coating Options: Available in AlTiN, TiAlN, TiAISI, TiSiN, TiN, DLC, Nano, and Diamond. High Precision: Precision level reaches 0.005mm for accurate CNC machining. Heat-Resistant Coating: HELICA coating allows for high-speed processing applications. Smooth Flute Design: Wide flute design removes cuttings easily to improve efficiency. Free Sample Available: Free samples provided if clients agree to pay shipping costs.