FITMENT: Works on Dodge Pickups 3.9L, 5.9L, 6.7L & 8.3L diesels engines and Cummins B/C Series diesels engines. SUPERIOR QUALITY: Machined from high quality 42CrMo Steel to ensure great tolerance and resistance to corrosion and rust. 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. FEATURES: This tool fits the flex plate teeth perfectly, and its load-bearing collar provides friction-free operation while rotating the tool in the housing – Rotating the engine is so easy. .