FITMENT: For Dodge Pickups 3.9L, 5.9L, 6.7L & 8.3L diesels engines and Cummins B/C Series diesels engines. FEATURES: 1）Superior Quality– Machined from high quality 42CrMo Steel to ensure great tolerance and resistance to corrosion and rust. 2）Using– Just insert the tool into the flywheel housing until it engages the ring gear, then attach a 1/2″ square drive ratchet or breaker bar and turn. .