Repair tool for BMW Water pump Hub Fan Clutch Nut Double-end Holding Tool for securing Water pump Hub from rotating during R & R of Fan Clutch Nut Applicable: M10, M20, M30, M40, M44, M50, M52, M52TU, M54, M56, M60, M70, M73, S14, S38, S50B30, S50B32, S54. This tool is normally used in conjunction with a 32 mm or 36 mm thin Wrench.