Metal drill bit set EXPERT/EXPERT 4x75mm (pack 10pcs) Cutop 53-478

Cutop Expert metal drill bit is designed for drilling holes in carbon and alloy steels, gray and malleable cast iron, non-ferrous metals and plastic. The drill bit is made of high-quality high-speed steel. Unique step hardening provides extremely high hardness to the cutting edge and the shank of the drill bit, and also contributes to increased resistance to breakage. Accuracy class A1. The drill bit has a cross-shaped sharpening angle of 135°, which ensures low runout and allows drilling precise identical holes. Thanks to an alloy with the addition of 6% tungsten and 5% molybdenum, the drill bit can withstand high temperatures, and 4% chromium and 2% vanadium in the composition prevent corrosion of the drill bit, extending the service life of the product.