The Abba Staged Adapter Set is an upgraded shaft which can be used with any wheel balancer. It offers a more refined and precise measurement. It makes the job of balancing much easier, thanks to each step sitting perfectly within any metric bearing ranging from 15-32mm.Upgrades your existing wheel balancer.Suitable for all metric bearings between 15-32mm.Machined using high quality CNC machinery.Supplied with a 12mm shaft.Does not require tightening.The Abba Staged Adapter Set is a highly refined piece of kit that will give you a much more accurate balance than any other wheel balancing shaft. The cones do not need to be tightened against the shaft, eliminating resistances which enables the ultimate accuracy. Each step sits snuggly into their respective diameter, allowing the full surace of the inner race of the bearing to rest upon it, further enhancing the accuracy and ease of use.