The Shimano stabilizer unit for XT RD-M786 and SLX RD-M675 is also compatible with the newer Shadow Plus rear derailleurs RD-M7000-10, RD-M6000 as well as Saint RD-M820 and ZEE RD-M640. It is also used in the Ultegra RX rear derailleurs. This is a two-piece spare part that includes the cam unit in addition to the actual chain stabiliser.