Ditto! It seems to be on the order of about 10:1 over Dremel blades and 20:1 over Harbor Fright, so the Fein blades wind up costing less.They all wiggle BUT the Fein blades really LAST
I own the Harbor Fright, Dremel and Fein. No comparison between the three in terms of quality.. For the Harbor Fright I just leave the sanding head on it and use it in my barn, with Fein paper, so I don't need to swap heads. I have had my Fein for a few years and only on my third flush cut blade and that is after many cuts through solid fiberglass, some metal and many hard woods. I throw Dremel blades away like they are box cutter blades...
They "all wiggle" but the Fein is worth the premium price if you use it a lot. I think the Rockwell Sonicrafter is about the best in terms of matching a price/quality ratio but again the Sonicrafter blades don't last as long as the Fein blades. My Harbor Fright was $29.99 and it was dead on arrival and my Dremel was $99.00.. The Fein about $369.00 for the full kit, with some extras, at the Maine Boat Builders Show with the "show special"...