Product Description Hex drive for 3/8" . Technical Information:Hex Material:chrome-silicon-manganese-molybdenum steelSocket Material:CrV steelDrive:3/8"Length:50 mmSizes (HX):4 / 5 / 6 / 7 / 8 / 10 mmManufacturer Numbers:4 mm:235755 mm:235766 mm:235787 mm:235798 mm:2358010 mm:23581Contents:1 x Proxxon 3/8" hex insert Manufacturer: PROXXON S.A. Härebierg 6-10 6868 Wecker Luxembourg office@proxxon.com