When drilling holes in wall and floor tiles with the diamond-coated "Ceramic" core bits (Ø 5 - 10 mm) from wolfcraft, the guide is an indispensable aid. It enables you to drill safely guided holes the first time you use it and protects the surface of your tiles. Two suction cups hold the guide reliably in position. The integrated sponge for proper water cooling of the diamond coating pushes out the previously absorbed water during the drilling process so that the frictional heat is absorbed. The guide is made of high-quality plastic and is a robust, durable product that will accompany you through many tiling projects.