Get down to business with the Pro Grade Diamond Hole Saw Drill Bit Kit from Superior Tools & Supplies. Inside a carrier case, this six-piece tile saw kit includes a suction drill guide and slotted drill bits in 1/4", 1/2", 1", 1-1/4" and 1-1/2". The diamond edge bits tackle any hard surface. Use only with a drill press or 800-2500 RPM handheld drill as well as a water cooling system for safe installation.