Quality tool ---Made of CRV steel with durability, flywheel locking tool is anti-rust and corrosion-resistant Tool should slide into opening toward engine with the top of the tool engaging the teeth of the flywheel. Forged 36mm socket---Use on the balancer bolt.Use with a 3/4 square drive wrench. Quality tool ---Made of CRV steel with durability, flywheel locking tool is anti-rust and corrosion-resistant Work on Duramax 2500 / 3500 pickups . T40272 Crankshafts Turning Tool for A6 A7 A8 Engine, Professional Duramax Flywheel Lock Tool Diesel Petrol Engine Flywheel Holding Tool Chain Locking Tool Kit For Bolaxin Tool For Duramax 2500 3500 Forged 36mm socket---Use on the balancer bolt. Duramax Flywheel Locking Tool DMAX2110 Tool should slide into opening toward engine with the top of the tool engaging the teeth of the flywheel. Remove metal spring-loaded inspection plate on the bottom of the transmission.