Wiha 29240 - Insulated Water Pump Pliers 240mm/9.5 OAL, capacity 7/8. Insulation according to EN/IEC 60900, DIN ISO 8976, ASTM F-1505 specification, up to 1000 Volt. Individually Tested. Box joint. Chrome-vanadium steel, drop forged, oil 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.