2pcs 6542 High-speed Steel 4mm Twist Drill Bit 200mm Length Black Oxide 16mm+6mm professional machine

professional machine

Female Thread Size: M8x18mm(D*L)

Rivet Nuts are available in many different styles and materials for many different kinds of applications

and cooling water

Operating temperature: -20 to 80 Celsius Degree / (-4 to 140 Degrees Fahrenheit)

2pcs 6542 High-speed Steel 4mm Twist Drill Bit 200mm Length Black Oxide 16mm+6mm professional machine1. 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