Magnetized slot, anti-slip marks. High accuracy. The bits are made from top quality Taiwanese S2 steel. Rib bits are produced by cold forming according to the exact specification. The splines of the bit undergo a special hardening process at temperatures up to 870°C. The result is a tip with a hardness of 60 HRC for increased tool life. The bits are made using CUTOP technology. Packing: blister 10 pieces. packaged.