By removing the crank hub or balancer and using a Moroso Crankshaft Socket Tool, engine builders have a positive way to turn over the engine
Tool makes it easier to locate TDC and BDC when degreeing camshafts
Broached keyway allows the socket (which fits 1/2" drive) to slide over the crankshaft snout and key. A knurled jam nut is used to position a degree wheel
Use Moroso Degree Wheel No. 62190(11"), No. 62191(18"), or No. 62192 Dual (18")