NeoDiamondĀ® 1121.8 Coarse Round End Taper Diamond Bur by Microcopy (USA). High-performance single-use friction grip (FG) diamond bur featuring a wide round end taper profile (2.1 mm diameter, 8.0 mm head length). Specifically engineered for crown and bridge preparations, efficient axial reduction, and establishing smooth, continuous chamfer margins without cross-contamination risk.