Prof. DIN 338. With 5% cobalt addition. For professional use. For drilling holes in carbon and alloy steels, including stainless steel, gray and malleable cast iron, non-ferrous metals and plastic. Accuracy class A1. Sharpening angle 135°. Ground profile. Art. 33860–33862 – cylindrical shank; art. 33864–33872 – triangular shank. Material: high-speed (HSS) steel P6M5K5. Packaging type: blister. Metal drill bit • Made of HSS P6M5K5 high-speed steel with 5% cobalt addition, which significantly increases hardness, wear resistance, and heat resistance. • Feature the highest accuracy class A1, ensuring hole drilling with high-precision diameter. • Manufactured by grinding the profile for smooth drilling and clean finished holes. • The spiral shape complies with DIN 338 and promotes efficient chip removal. • Cross-grounding of the cutting edges and a sharpening angle of 135 degrees allow starting drilling without pre-center drilling, even on round products. • Stepped sharpening increases drilling speed with less effort. • No jerking when passing through the material.