comp cams crankshaft socket for buick, for pontiac v8 and for ford v8

COMP Cams crankshaft sockets are the perfect addition to your engine-building toolbox. They accept 1/2 in. drive ratchets for versatility and easy engine rotation. They're precision-machined for an accurate fit over the crank snout, and their knurled retaining nut threads-on to sandwich a degree wheel in place. The nut can be loosened, while on the crank snout, so that the wheel can be turned independently of the engine when finding top dead center.