Wiha 20133 - Insulated Open End Spanner 5/16. Insulation According to VDE Specification 0680 and EN/IEC 60900, DIN 7446, up to 1000 Volt. Individually Tested. Chrome-vanadium steel, hardened. Angled 15deg.
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.
WARNING: Cancer and Reproductive Harm—www.P65Warnings.ca.gov