Drill 3.8mm for metal R9

Metal drill R9 3.8 mm

Metal drills made of high-speed steel R9 according to DIN 338 are designed for drilling holes in especially strong high-alloy metals with a density up to 1000N/mm, as well as stainless, refractory and acid-resistant steels . By adding cobalt and other alloying elements to the composition, the red hardness of the drill is significantly increased.