NorZon Grinding Discs, 7", Grit 36, Package of 25 Superior zirconia alumina abrasive makes NorZon fibre discs outperform and outlast conventional discs. A quick initial and a self-sharpening action continuously expose sharp, new cutting points. Its cooler-running characteristic results in reduced loading, less frequent disc change-overs, and greater efficiency and productivity 38593 No -