Review on Amoolo 4.5-Inch Flap Disc Set - 20Pcs 40 60 80 120 Grit Angle Grinder Sanding Discs, High Density Abrasive Grinding Wheels Type 29 for Metal and Wood Grinding - 7/8 Inch Arbor Size by Rico Dantzler

I should have paid more and gotten decent flap wheels. I used up my last Dewalt flip flop by grinding a few welds and then replacing them with my first one. It's so thin it doesn't even snap into place. I had to add a washer to make it thick enough to fit my coffee grinder. As a Dewalt disc it was maybe 50% used. I think it's "good value" if your time isn't worth anything as they are very cheap. But in the future I will spend more to get a better ride. live and learn