6542 High-speed Steel 8.5mm Twist Drill Bit 300mm Length Black Oxide Flat-Belt Idler Pulleys 150 Pcs x 304 Stainless

150 Pcs x 304 Stainless Steel Flat Washer

Net Weight: 134g

Outside Diameter: 32mm / 1

Healthy and non-toxic

6542 High-speed Steel 8.5mm Twist Drill Bit 300mm Length Black Oxide Flat-Belt Idler Pulleys 150 Pcs x 304 Stainless1. 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