Product Description Phillips head screw insert for 1/4" . Technical Information:Blade Material:chrome-silicon-manganese-molybdenum steelSocket Material:CrV steelDrive:1/4"Length:33 mmSizes (PH):PH 1 / PH 2 / PH 3Manufacturer Numbers:PH 1:23730PH 2:23730PH 3:23732Contents:1 x Manufacturer: PROXXON S.A. Härebierg 6-10 6868 Wecker Luxembourg office@proxxon.com