For Separating of all-ceramic crown & bridges. A speciliast & powerful friction grip crown cutter designed for all-ceramic restorations (incl. zirconium oxide/zirconia/e-max/lithium disilicate crowns & bridges), developed especially for this particularly difficult & high-torque task. Working Length of Diamond Grit Part = 4mm. With angle of 3 Degrees. Due to the high-torque forces in Crown-cutting the bur is recommended for use in Redbands (instead of lower-torque performing air Turbine Highspeeds) at the optimal speed of 160,000rpm. Head Diameter size = 016 (1.6mm).