2pcs 6542 High-speed Steel 4mm Twist Drill Bit 200mm Length Black Oxide 16mm+6mm Overall Diameter: 50mm / 1

Overall Diameter: 50mm / 1

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Material: High Speed Steel (HSS 6542)

1 x RG58 BNC to BNC Cable

2pcs 6542 High-speed Steel 4mm Twist Drill Bit 200mm Length Black Oxide 16mm+6mm Overall Diameter: 50mm / 11. 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