Wiha 75900 - Extension blade for System 4 Micro Bits, 100mm. Shaft CVM steel, hardened, corrosion protected. Ball retainer bit extension for 4 mm bits.
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