High-Speed Steel Cobalt-Containing Extended Twist Drill Bit

1. High-performance HSS cobalt-containing high-speed steel material can improve the wear resistance and cutting performance of steel
2. Adopting excellent and exquisite craftsmanship, the drill bit is finely polished, wear-resistant and durable, and has a long service life
3. The universal handle design makes clamping easier and tighter, and the ligament streamlined design is not easy to damage