
Runchit Solid Carbide Tool Tungsten Carbide Step Drill Bits for Hardened Steel (NHA116). Solid Carbide Construction: Made from solid carbide substrate with high-performance coating for durability. High Precision Machining: Designed for high-speed and high-precision processing on CNC equipment. Wide Size Range: Available in diameters ranging from 0.1mm to 20mm. Versatile Material Compatibility: Suitable for alloy steel, tool steel, cast iron, and carbon steel. Advanced Coating Technology: Utilizes Balzers coating technology to enhance wear resistance. Manufacturer Direct Supply: Direct sales from manufacturer with own trading company and R&D team. ISO9001 and SGS Certified: Products meet international quality standards with ISO9001 and SGS certification. OEM and ODM Support: Customization services available for specific manufacturing needs.