This is a good imported set. It's not a great tool, but it's a good tool. The threads are decent reels and there are enough of them to mesh tightly with the flywheel. I removed the stock flywheel from my 1973 Ossa MAR. If you're thinking of using some penetrating oil first, get it spread over the shaft and tap the wrench with a hammer or other punch (don't smash it), you should be fine. The metal appears to be low grade mild steel or "black iron" and is not what I would call "tool steel". However, for this purpose they work. They're not as good as the Ultra-Threaded Motion Pro pullers I have, but the set costs less than just those three, so pick your poison. Super fine threads, I would buy (and buy) the best brands. Standard or coarse thread, they have enough meat to get the job done with the right technique.
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