Attributes:* Twist Drill Bits Diameter: 1mm / 0.04"* Shank Diameter: 1mm / 0.04"* Blade Length: 12mm / 0.47"* Total Length: 34mm / 1.33"* Material: M35 High-Speed SteelWhat Is Included:* Package Content: 20Pcs x electric drill bitsApplications & Features:--- Metal drill bits are essential for professional carpenters and construction workers. Suitable for drilling holes in metal, wood, and plastic.--- Suitable for electric drills, hand drills, and impact drills.--- The drill bit is made of M35 high-speed steel, which is hard and wear-resistant and not easy to break.--- Spiral chip removal design makes chip removal smoother, more efficient, and more labor-saving.--- Sharp cutting edges allow for smooth cuts without burrs--- The tool tip is centered to improve cutting accuracy.Useful Tips:--- The rotation speed should not be too high during operation, and the drill handle must be clamped during installation to prevent shaking and slipping.