This is a replacement Kyosho HD Rear Universal Swing Shaft, and is intended for use with the Kyosho MP9 TKI3 1/8 scale buggy, but can also be used optionally with the MP9 TKI2, MP9 and MP9e 1/8 scale buggies. This shaft is used in the rear-center position, is 110mm long and includes a set screw.