Mounts to the cam chest side of the engine case using the designated mounting holes of the tool combined with the handled thumb screws and the case cam cover bolt holesQuickly and accurately measures gear drive back lash on Twin Cam engines, using the supplied spacer to bolt indicator to top right cam cover bolt holeSimplifies and speeds the process of checking crankshaft run out on both Twin Cam and EVO model engines with the crankshaft installedTool includes:Tool plate+/- 0.001 dial indicatorThumb screws and hardwareMade in the USAFits: measures crankshaft run out on Shovel, EVO, Twin Cam and gear drive backlash on Twin Cam gear drive setups.