Scotch-Brite radial bristle discs Grit 220 (Red) Ø150mmScotch Brite radial bristle discs replace alternative abrasives, wire brushes, chemicals and compounds for deburring, cleaning, finishing and polishing detailed parts or small areas. These discs have exceptionally flexible bristles for improved con formability. Scotch Brite 3M technology 150mm 8 lap wheel (1 wheel consists of 8 discs) Adjustable bore diameter: 12. 75, 16, 20, 22 & 26mm all possible The centre bore consists of rings which when removed