IVY Classic Industries is dedicated to producing a comprehensive, quality line of power tool accessories and hand tools. IVY Classic Diamond Plus Dry and Wet Cutting Diamond Grit Hole Saws are designed to drill holes (rotary drilling only) in porcelain, hard tile, quarry tile, granite tile and glass. The slot in the hole saw provides easy plug removal while the vacuum-brazed grit ensures long life. Use with low RPM and minimal pressure. For cool cutting lubricate with water for extended life.