NeoDiamondĀ® 1812.8 Beveled Cylinder Diamond Bur by Microcopy (USA). High-performance single-use friction grip (FG) diamond bur featuring a beveled cylinder (chamfer) profile (1.2 mm diameter, 8.0 mm head length). Specifically engineered for crown and bridge preparations, axial wall reduction, and establishing precise, smooth chamfer margins without risk of cross-contamination.