Cheap And Discounts Roland DWX 52D Dental Milling Burs For Grinding Zirconia D.a 4mm Shank DC Diamond Coating Drill Diameter 2.0/1.0/0.6/0.3mm Tools Wholesale. Buy Directly From Merchant Shop1102926224 Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.