PH2x100mm S2 Screwdriver Bit. Specially designed bits for use in professional craft and production facilities. They feature a unique NON-SLIP SYSTEM that prevents the bit from slipping out of the screw head. The bits are made of the highest quality S2 tool steel with a hardness of 58-62 HRC, using cold forging. The combination of high-quality material and the forging method allows for a high tightening torque of 21.8 Nm.