6542 High-speed Steel 9mm Twist Drill Bit 200mm Length Black Oxide Metal and cooling water

and cooling water

perfect for furniture

high-speed movement

x Candle Like Socket Cover

6542 High-speed Steel 9mm Twist Drill Bit 200mm Length Black Oxide Metal and cooling water1. It is made of 6542 HSS (high speed steel) steel, which has good toughness and hardness, is not easy to break, and is easy to remove chips. Black oxide surface treatment, good rust resistance long durability. 2. The spiral groove design can avoid the displacement of the drill bit during the working process, and at the same time, the debris can be removed more quickly and easily. Sharp cutting edges provide smooth cutting without burrs. 3. The twist