Description

Wiha 21391 – Insulated 6 Piece Inch Gear Wrench Set. Insulation According to EN/IEC 60900, ISO 3110 specification, up to 1000 Volt. Individually Tested. Blade chrome-vanadium steel, hardened. Includes: 3/8, 7/16, 1/2, 9/16, 5/8, 3/4

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.