DT DIATOOL Diamond Drill Bit 6/8/10mm 3pcs/set Hole Saw for Dry Drilling Tile Porcelain Marble Ceramic Granite

total 3 pieces; diameter 6/8/10mm; total length 10mm, diamond head height 10mm;diamond grit:#35/40. Vacuum brazing technology enables a strong bond between diamond, bond and substrate, greatly improving tool life and machining efficiency. Vacuum brazing technology has a much longer service life than electroplating technology. Drilling for ceramic porcelain tile marble,etc. Wax inside for cooling, dry drilling without water. Wet use helps prolong service life. Suitable for grinders with M14 threaded spindle. Recommended RPM: 6000. Max RPM: 11000. If you fit them on hand drills, you need an adapter, such as SDS, hex, Round plus shank, etc.Do not use hammer mode. Not recommended for hard concrete, especially reinforced concrete.Please wear protective gear to protect your eyes, ears, mouth, nose, etc. before operation.