The Endodontic Zirconia Access Kit is specifically designed for smooth endo access through the hardest of materials. Endo access diamonds are manufactured to tunnel through the porcelain layer in seconds, and the zirconia or lithium disilicate based crown or bridge with efficiency previously thought impossible. Great White®Z Diamonds are designed for Endo Access in all types of ceramic crowns such as Zirconia, Lithium Disilicate, e.max® and BruxZir®, reducing the chance of micro-fracture.