Wiha 74632 - Torx Plus Power Bit IP30 x 50mm. Impact resistant modified chrome-vanadium-molybdenum, tool steel, hardened to HRC 59-61. Suitable for both manual & machine applications. Sold as 10 Pc Pkgs Only
CVM or Chrome-Vanadium-Molybdenum steel is a special, high strength, high performance alloy. Chromium improves wear resistance, hardness and corrosion resistance. Vanadium also improves the grain structure for a tougher tool. Molybdenum improves impact resistance as well as increases tensile strength and elasticity to prevent tool breakage and snapping.