This Haweka quick wing nut set will fit all model balancers with 40mm X 4mm shaft. To check, measure the shaft diameter (40mm) and the thread spacing (4mm) on your balancer shaft. Thread spacing is the distance of one thread and one space; for example, the distance from the left edge of a thread to the left edge of the next thread (Approximately 7 threads per inch). NOTE: YOU MUST CHECK THE SHAFT THREAD PITCH ON YOUR 40mm SHAFT TO SEE IF YOU HAVE A 3mm, 4mm or 5mm BEFORE ORDERING.
