Product Description 【Material】: The engine barring tool is made of high carbon steel, with a corrosion-resistant and anti – rust coating, which is for durability and solid protection. There is a wear-resistant rubber ring in the middle. The tooth plate has undergone heat treatment, resulting in higher hardness. 【Interchange Part Number】: 3824591A, 5299073 and OTC-7471A 【Fit for】: Fit for Cummins B & C series Diesel engines, and 3.9L, 5.9L, 6.7L, 8.3L liter turbo diesel engine used for Dodge pickups. 【Function】：The barring flywheel cranking turning rotating tool is suitble for barring over the engine to make clutch adjustment, used to turn engine/flywheel. For you to rotate an engine or turn the crank while performing valve lash adjustment, this tool makes the job easy. 【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. Engine Steering Socket Wrench Tool Durable Material wear-resistance higher hardness corrosion prevention antirust Product Size