Electroplated diamond core drill bit is one kind of diamond drilling tool. It is mainly used to drill marble, ceramics, porcelain, tile, glass, fiberglass, quartz, bricks, anda variety of other materials. With maximum diamond particle exposure, it ensures efficient drilling performance: Fast drilling, Smooth cut.Optionaldiameter: 5-127mmOptional grit: #46(D427), #60(D252), #100(D181)Delivery time: 30daysWe,Hangzhou Kongs Tools Co., Ltd. is a leading manufacturer of electro-plated diamond tools, which are used in stone and construction industries, such as marble, granite, sandstone, limestone, basalt, and grit stone.Our main products: 1. Electroplated diamond saw blades(cutting discs) 2. Sintered diamond saw blades 3. Diamond tuck point blades 4. Electroplated diamond core drill bit (hole saw) 5. Electroplated diamond grinding discs & wheels 6. Electroplated diamond sharpeners 7. Electroplated diamond burrs & files 8. Diamond polishing pads 9. Electroplated diamond wire saw (beads)