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 holesGives quick and accurate readings of the engines crank pinion shaft run out and makes for a great display to show and explain to customers the condition of their crankshaftSimplifies and speeds the process of checking crankshaft run out on M8 model engines with the crankshaft installedTool includes:Tool plate+/- 0.001 dial indicatorThumb screws and hardwareMade in the USAM8 crankshaft runout and gear drive backlash measuring tool.