High Performance Dust-Free Discs - Cut Faster and Last Longer. 3M's Clean Sanding spiral hole pattern, produces superior dust extraction and increased disc life compared to other dust-free discs. Efficient dust removal helps keep the abrasive surface cleaner for better sanding. Furthermore, they last longer than the same discs without the holes, whether or not they are used with a vacuum. 734U light purple (moderately coarse grits) discs are constructed of a unique blend of aluminum oxides and a.
