Fits For BMW M47 / M47(TU) and M57 / M57(TU). Works on Diesel engines as follows. E46:318D,320D,330 | E39:525D,530D | E38:730D | E60:525D530D,535D | E61:525D,530D,535D | E53:X5 3.0D. Designed for holding the sprocket or chain in place when disassembling the VP44 Injection pump and high pressure pump common rail fitted to BMW engines, which saves you a lot of trouble during work.