Pearl REDLINE 6" x 1/8" x 7/8" Depressed Center Grinding Wheel (Pack of 10) Pearl REDLINE 6" x 1/8" x 7/8" Depressed Center Grinding Wheel (Pack of 10) Hybrid Aluminum Oxide grain Grit: A/WA 30R MAX RPM: 10,200 QTY: 10