Adjustable crankshaft fan belt pulley, 3" diameter. Raised edges, split

Precision machined aluminum. If your original pulley has been loose it may have worn the surface the of the crankshaft to the point where it is undersized. Putting a standard new pulley on may not fix this problem because it will still be loose. This split pulley will solve the problem. There is a allen headed set screw that tightens the pulley up on the worn crankshaft. Has raised edges to prevent belt for slipped off.