Loading... Please wait...Wiha 71312 - Hex Metric Insert Bit 4.0 x 25mm. Impact resistant modified chrome-vanadium-molybdenum, tool steel, hardened to HRC 59-61. Suitable for both manual and 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 to prevent breakage, tensile strength and elasticity to prevent tool breakage and snapping.