Product Description Hex drive for 1/4" . Technical Information:Hex Material:chrome-silicon-manganese-molybdenum steelSocket Material:CrV steelDrive:1/4"Length:33 mmSizes (HX):2 / 2.5 / 3 / 4 / 5 / 6 / 8 mmManufacturer Numbers:2 mm:237442.5 mm:237463 mm:237434 mm:237455 mm:237476 mm:237498 mm:23751Contents:1 x Manufacturer: PROXXON S.A. Härebierg 6-10 6868 Wecker Luxembourg office@proxxon.com