This is a Tecumseh crankshaft #33245. This crank is pretty unique in that it has the older style straight cut cam drive gear but is for electronic ignition (no eccentric lobe for points.) The business end is 1" diameter by 2 3/4" long and it comes with the nut and keys. Threads, gear, and keyway are in great shape. Any questions just ask. I have lots of parts for these engines, let me know what you need. Thanks for looking!