AVIA PRO TILER DRILL BIT For drilling Granite, Marble, Porcelain and Ceramic. Only apply light pressure when cutting - let the diamonds do the work.Use a swivelling motion, don't hold in one position.If drill gets too hot, dip in cup of water or stop and wait to cool. Awesome drill bits need looking after so don’t force and keep cool and this will fly through the toughest tiles. As suggested above, do not hold straight and/or push hard - this burns out all makes and types of diamond tools very quickly.

120mm AVIA PRO TILER M14 Diamond Grinder Dril Bit