أقراص زركونيا نورتون الصلبة PSA (درجة ثانية، انحناء طفيف)

Took a chance on the 150 grit to smooth out some weld beads and was pleasantly surprised how well they cut despite the slight curl. The adhesive backing stuck firmly to my orbital sander and didn't peel off mid-job.

Grabbed the 80F grit for some quick stock removal and the curl actually helped get a better edge on a convex surface. They stick well to the backup pad and hold up longer than the cheap discs I was using before.

Used these 80-grit discs on my angle grinder to strip rust off a steel table — the curl made them sit a tiny bit uneven at first but stuck firm once pressed down. They cut aggressively and lasted through three full passes without tearing up, which is way better than the cheap flap wheels I'd been re