Wiha 29006 - Insulated T-Handle Socket Holder 1/4 Drive x 160. Insulation according to EN/IEC 60900, specification, up to 1000 Volt. Individually Tested. Blade chrome-vanadium steel, hardened.
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.