... 4.factory price vacuum brazed diamond point tools bits for caving tombstone,stone marble granite letters and relief Product specification:C1----C20 ... ,45mm,50mm,60mm,70mm,90mm,150mmUsed: hand tools, CNC machineapplication: tombstone,tile,sone,marble ,granite,glass,concrete and others hardness meterialsAbout UsLONGXIANG ...