I got these for my 6 inch grinder. The first 3 I tried didn't stick well to the metal disc. They stay for a few uses and then separate from the metal disk. I even tried cleaning the wheel with carburetor cleaner, same result after a few days. Maybe I'll try some glue next time. But really an extra step I didn't want to mess with. Too bad I have to use 6 more before trying another brand.
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