ZT.DIA.B2.06.4.060.40.X.R0 | 0.6mm Zirconia Bur for Datron* D1* Machines (2-Flute Ball) 0.6mm 2-Flute Ball Carbide Milling Bur for Zirconia FLATCOAT® DIA Coating, Shaft Diameter of 4mm, No Ring.