Wiha 27791 - Precision ESD Safe Inch Nut Driver 8 Piece Set. Blade CVM steel, hardened, hard chromed. Handle impact resistant, dissipative material. In storage pouch. 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