Product Description Phillips head screw insert for 3/8" . Technical Information:Blade Material:chrome-silicon-manganese-molybdenum steelSocket Material:CrV steelDrive:3/8"Length:50 mmSizes (PH):PH 1 / PH 2 / PH 3Manufacturer Numbers:PH 1:23594PH 2:23595PH 3:23596Contents:1 x Manufacturer: PROXXON S.A. Härebierg 6-10 6868 Wecker Luxembourg office@proxxon.com