The new Jims Mighty Bite Flywheel Lock Tool (No. 753) is designed to hold Twin Cam flywheels in place while performing service work to the connecting rods or pistons with the cylinders off the engine. Simply take out the flywheel position sensor and install the “Mighty Bite” into the case, and the flywheel is now locked from being able to turn or rotate. This tool is made in the USA and is backed by a lifetime warranty.