dental lab tools: Last 5-10 times longer than diamond plated bur For dental lab,jewelry,lapidary,gemstone 5 grits Technology:1. Consist of diamonds throughout, sintered diamond burs also specifically manufactured to cut and trim Zirconia, Alumina Oxide and other hard ceramic and jewelries materials, suitable for shaping, carving and polishing all kinds of minerals.2. Last 5 to 10 times longer ...