Diamond Machining Technology's Magna-Disc System discs are compatible with Work Sharp's WS2000 and WS3000 sharpeners. DMT's Magna-Discs eliminate excessive heat or sparks for a cooler, cleaner working environment. DMT's diamond discs do not exceed 90 degrees F in use. Magna-Discs are available in multiple grits: 45 micron, 325-grit coarse; 25 micron, 600-grit fine; and 9 micron, 1,200-grit extra fine.