Description:

Specifications: Twist Drill Bits Diameter: 4.2mm / 0.17-inch; Drill Bit Length:180mm / 7.09-inch; Shank Diameter: 4.2mm / 0.17-inch; Total Length: 250mm / 9.84-inch; 1 x Straight Shank Twist Drill Bit. [Strength and Hardness]- Made of 6542 HSS (High Speed Steel) steel. With high hardness, wear-resistant, and fast drilling performance.. [Twisted Design]- With the twisted design, it can improve cutting accuracy by centering the tip. It can avoid displacement of the drill bit during work, and at the same time remove debris and particles faster and easier.. [Professional and DIY Use]- Suitable for drilling hard materials and hard metals such as cast iron, hard plastics, but also soft materials. When it cannot penetrate, try adjusting the RPM..