The Lisle Corporation 36mm 12-pt Barring Wrench for Duramax, No. 22130, is designed to turn the crankshaft on 2001 and newer Duramax engines allowing access to the torque converter bolts. The 22-1/2" long, offset design allows the 36mm 12-pt wrench to clear the stabilizer bar from under the truck. The wrench can also be used to make sure the engine rotates freely while troubleshooting other issues. It offers dual material grip for comfort.