UnoDent Diamond Burs Flame FG No. 564 564 Medium 257-023M (368) Made with the finest Swiss-made steel shanks. Extensive range of shapes in all the most popular sizes. Triton™ bonded to double the strength of diamond adhesion and improve performance. Up to four grit sizes for all uses. Diamond Burs FG (Friction Grip) No. 564 Medium Grit - Flame.