Description:

[Specifications]- Twist Drill Bits Diameter: 4.2mm / 0.17-inch; Drill Bit Length:100mm / 3.94-inch; Shank Diameter: 4.2mm / 0.17-inch; Total Length: 160mm / 6.3-inch; 2 x Straight Shank Twist Drill Bit. [Strength and Hardness]- Made of high-speed steel. HSS(High Speed Steel) enables the drill body harder and can keep a longer drilling life.. [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 processing non-ferrous metals, such as copper and aluminum, and also suitable for hard plastics. When it cannot penetrate, try to adjust the RPM..