Marcrist PG750 Natural Diamond Tile Drill 25 mm MRCPG75025 The PG750 Series Diamond Tile Drills have real natural diamonds and MUST always be used with water.Will drill the hardest of tiles with ease and leaves clean precise holes in any tile however hard with any drill, even cordless.DrillsAll Tiles - However hardNatural StoneCeramicMarbleTerracottaGranitePorcelainWith real natural diamondVacuum brazedAutomatic core ejectionFastUniversalLong lifeLowest cost per hole drilledFor day-to-day users MRCPG75025