Each pack contains three discs: 1 coarse disc for Stripping (36 grit), 1 medium disc for Cleaning (60 grit) and 1 fine disc for Polishing (120 grit). Flexes around contoured and curved surfaces, can be used as a finished disc after the Clean-N-Strip disc. Clog resistant, 4" fits 4" angle grinder, 4-1/2" fits either 4-1/2" or 5" angle grind. Must be used with Quick Loading Adapter (sold separately).
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Comments about 3M Company Sandblaster Surface Conditioning Grinder Disc - 968:
These work great for putting a nice smooth finish on steel. I've mostly used mine on armour- removing forge scale and planishing marks. They're quick, give an even finish and can either bite off more or give a smoother look depending on the pressure you use. If the wheel gets nicked or tattered, THROW IT OUT. It becomes a steel throwing monster that will happily bite you.
Comments about 3M Company Sandblaster Surface Conditioning Grinder Disc - 968:
The only drawback to these discs is the fact that they aren't available in bulk packs. I'd like to see them available in packs of 5 or more for each grit. Great item, super results.