Raytal High Quality Black Golden High-Speed Steel 4-12mm 9 Steps Drill Bit, with Hex Shank, Spiral Flute, Metric Sizes

Raytal High Quality Black Golden High-Speed Steel 4-12mm 9 Steps Drill Bit, with Hex Shank, Spiral Flute, Metric Sizes. Versatile Size Options: Metric sizes from 4mm to 32mm with 5 to 15 steps available. Customizable Features: Customized logo, size, packing, and graphic designs available. Advanced Surface Treatment: Options include Black Golden, Titanium, TiAIN, Cobalt, and Nano-blue coatings. Efficient Spiral Flute Design: Spiral flutes quickly remove debris to improve drilling speed and efficiency. Secure Hex Shank: Hex shank design ensures a secure grip and prevents slipping during use. High Production Capacity: Annual production capacity reaches 500,000 pieces to meet large orders. Professional R&D Support: Over 20 patents applied annually with dedicated R&D teams.