Upgrade Design: Exclusively designed fits the flex plate teeth, the load-bearing collar provides friction-free operation while rotating the tool in the housing. High Quality: Made of high quality solid steel with black powder coated surface, providing an unparalleled lifespan, anti-corrosion and wear. Fit: Fits for Volvo trucks 2008-2018 – all models (D11, D13, D16 Engines), 2008-2018 Mack trucks – all models (MP7, MP8, MP10 Engines). OEM Part Numbers: 88800014 and 88840317. Directly replaces Save your time and money. Function: This Flywheel barring tool will help you rotate your crankshaft with ease while performing overhead adjustment, replacing your injectors, or timing your engine. Crank flywheel tool will rotate freely while barring the engine over.