Great Compatibility Fit for all 2008-2020 Volvo D11, D13, D16 and Mack MP7, MP8, MP10. Upgrade Design Used to turn the Crankshaft flywheel in order to position it during timing procedures. Remove flywheel cover plugs and place the rotation tool, to rotate the flywheel with ease. The Crank Flywheel Tool will rotate freely while barring the engine over. Must Have Tool If you’re planning on performing an overhead adjustment or are replacing your injectors on your D13, this tool is a must-have in your toolbox. Special designed to rotate the flywheel of crankshaft for correcting the timing position. .