Nisorpa 50 Pack 5in Flap Discs 40 Grit Zirconia Oxide Sanding Discs Industrial Abrasive Flapper Grinding Wheels for Wood Metal Stainless Steel Polishing

These flap discs seem to have mixed reviews; some customers claim that they are great value and last a long time compared to others, while others say that they are low quality and fly apart while in use. One customer found that they were advertised as having a 5/8" arbor hole but actually had a 7/8" arbor hole, making them unusable. The media seemed to keep its grittiness better than some higher-priced flap discs, and they come bundled in a tall stack, which is good for larger projects.