It’s an essential tool set for holding the flywheel or blocking crankshaft pulleys when releasing and tightening the vibration damper central bolts on BMW M47T2, M57T2, M57TU, M67, N43, N45, N45T, N46, N46T, N47, N51, N52, N53, N54 & Mini W17 diesel / petrol chain drive engines. The tool set can also be used to hold the flywheel when removing the timing chain for cylinder head work.