Stahlwille 03090016 54CV M16 Screwdriver socket 1/2" For spline socket head screws (Ribe CV®), Chrome Alloy Steel, chrome plated. Features: Size: M16 L1mm: 63 L2mm: 23 Dmm: 27,5 Weight g: 163 Application: Size M7, for brakes, cylinder head screws, bodywork and motor jobs incl. valve covers and spark