SeptoDiscs Kit Assorted Abrasive Discs 120 Assorted 1/2' and 1 Pop-On Mandrel. The flexible discs allow access for interproximal trimming and incisal edges. Finer grits result in higher gloss while coarser grits remove large excesses. The snap-on mandrel allows users to easily mount and invert discs. Package of 120 discs