Rotates flywheel/piston assembly with engine still in frame or on a bench The perfect tool when doing pushrod adjustments, building big-inch engines and checking operating clearances Also can be used to keep the flywheel assembly from rotating when torquing the cam drive sprockets retention bolts Built with a long socket design, making it easier to use without a 1/2" drive extension on your 1/2" driver Made in the U.S.A. Not for use with an air or electric impact wrench; this tool is only guaranteed for use with hand drivers. TOOL ENG ROTATOR 55-06 BT