Wiha 36548 - Wing Style Torx Plus IP9 X40mm. Blade high alloy CVM steel, hardened, black finish. Wing handle high quality plastic, impact resistant. Not for use in standard Torx fasteners
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