United Abrasives- SAIT 23327 Type 1 6-Inch x .045-Inch x 7/8-Inch 10200 Max RPM Z-Tech - High Performance Cut-Off Wheels, 50-Pack Hard bond for extremely long life. fast, burr-free cutting. Ferrous and/or non-ferrous metals (iron, steel, welds, etc.) Manufactured with patented 3M Cubitron grain to outlast standard aluminum oxide wheels Designed to provide very long life for fewer wheel changes and less downtime All sizes reinforced with the highest quality fiberglass for maximum safety and performance