6542 High-speed Steel 7mm Twist Drill Bit 300mm Length Black Oxide 15/16-Inch machinery manufacturing industry and for

machinery manufacturing industry and for all kinds of household appliances

Outer diameter : 252mm / 9

Overall Diameter: 150mm(5

paper feeder

Size: 92 x 60 x 29mm / 3

6542 High-speed Steel 7mm Twist Drill Bit 300mm Length Black Oxide 15/16-Inch machinery manufacturing industry and for1. 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