Diamond-ground, precision TCT Drill Bits specifically designed for rapid penetration through the hardest of industrial and porcelain tiles. Will also drill through marble, granite and ceramics. Won't wander or slip. Must be used with water cooling kit (Code 39598). Supplied with masonry drill bit.
"Not bad , after trying this type and diamond drill in porcelain tiles , i preferer the diamond type. Have to keep well cooled Does not slip on start up , dont use to drill between tiles on grout line , the drill tip chips ."