Special featuresThe range of diamond core drill bits is specially designed to enlarge or adjust the diameter and shape of a previously made hole. Can also be used for smoothing, polishing or cleaning the inner edges of previously drilled holes.Suitable for processing natural stone and porcelain stoneware and landscaping materials.Thanks to the M14 connection, it fits any angle grinder on the market with an rpm between 6,000 and 11,000. The diamond quality and concentration are high for a long service life. The diamond is vacuum brazed. Ensures a good finish thanks to the #50-60 grit size.The diamond core drill bits ARE NOT SUITABLE for making holes.