Metal drill bit, Bosch, 3.5x391x70 mm, 10 piece

Twist drill bit made of high speed steel manufactured to DIN 338. Type N, drill bit tip 135°. Rolled spiral flute with ground point, vapour-plated.Shank equal to drill bit diameter. Two-cutter, cylindrical, two flutes. High elasticity due to low-heat shaping manufacturing process. Low risk of breakage - especially when drilling with diameters smaller than 6mm. Spiral flute with oxide coating for rapid chip removal. Suitable for steel , non-ferrous metals, cast iron, hard plastics.