4-1/2" X 1/2" X 7/8" T27 Macrostrip Wheel. The disc can clean welds, remove rust, paint, scaling, and oxidation effortlessly. These discs are made for use on a die grinder and should only be used with the proper size mandrel. The discs can reduce the possibility of paint building up and the quick-change discs are a highly flexible alternative to wire brushes, hand scrapers, and abrasive discs. It is ideal for all kinds of surface conditioning metalwork.