Wiha 34753 - SoftFinish Heavy Duty Nut Driver With Hex Bolster 3/16 x 125mm. Blade CVM steel, hardened. Deep drawn 1in. socket. Solid shafts. Wiha-SoftFinish handle, multi-component, cushion grips.
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.