ZT.TEC.B2.03.4.030.50.X.R0 | 0.3mm Zirconia Bur for Roland* DWX* Machines (2-Flute Ball) TEC Coating 0.3mm 2-Flute Ball Carbide Milling Bur for Zirconia FLATCOAT® TEC Coating, Shaft Diameter of 4mm, No Ring.