The 379 is medium grit, football/egg shaped diamond bur used for occlusal adjustments.
This diamond bur shape is also available in the following grits: 379UF - Ultra-fine grit (white) 379EF - Extra-fine grit (yellow) 8379 - Fine grit (red) 379 - Medium grit 6379 - Coarse grit (green) 5379 - Super-coarse grit (black) 379XC - Extra-coarse grit (purple) H379 and H379Q - Matching carbide finishers
