The CorePlus Diamond Tile Drill Bit provides professional, fast, clean cutting on porcelain and ceramic tiles. Its leading-edge vacuum brazing technology ensures the diamonds stay bonded for extremely long life. It uses premium-grade, braze-bonded diamonds designed to cut the hardest of materials. Easy start, no-drill guide required. Requires minimal water cooling, not a continuous water feed. The core waste material auto-ejects allowing for continuous hole cutting. It is fitted with a Tri-Flat shank for excellent performance on cordless drills.