API Milling Tool - DC (Yenadent) the unique properties of multilayer diamond coatings offer significant performance potentials which are ideal for machining highly abrasive materials such as zirconium oxide.High-quality, accurate tools are optimized to allow your system to run more efficiently.Dc milling tool with cutting edge diameter of 0.6mm to 2.0mm.Larger diameter tools are mainly used for efficently roughing whereas small diameter tools are used for finishing or carving out fissures.