Wiha 28512 - MagicSpring Torx Interchangeable Blades For TorqueFix & TorqueVario T6 x 175mm. Blades on narrow 5/32 Hex shafts. High alloy CVM 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