This is a ride height measurement tool for Ducati 748/916/996/998. The secret to proper suspension set up on a Ducati 748-998 starts with the proper ride hieght. This tool allows you to measure it by giving you a standardized marked reference point. Every time you adjust your chain the ride height changes because of the eccentric in the swingarm. The plug that goes into the rear axle comes with a stainless thumb screw to attach it to the tool for storage. This tool is CNC machined out of billet aluminum and comes in two colors black or gold. All of our tools come with a 100% satisfaction guarantee!!!