Wiha 28568 - Torx Interchangeable Blades For TorqueFix & TorqueVario T20. Torx tip blades on narrow 5/32 Hex shafts. High alloy chrom-evanadium-molybdenum steel, hardened, satin hard chrome finish.
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