Wiha 26591 - Precision Nut Driver 8 Piece Set. Blade high alloy chrome-vanadium-molybdenum tool steel, hardened, hard chrome finish. Includes: 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4
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.
WARNING: Cancer and Reproductive Harm—www.P65Warnings.ca.gov