130mm/5inch Diamond Drill Bits Hollow Core Drill Bits compatible with Glass Ceramic Porcelain Tiles Marble Gran

Quality : These diamond drill bits are made of high 45 steel which is high quality and durable. With a -plated coated body to resist corrosion, which has a long service life. chip holes to when the punching smooth, punching . Smoothly Cutting: A thicken diamond dust coating on the tops offers superior cutting strength compatible with creates a high , smooth cut with no broken edges. Reduced drill speeds, low drill pressure, and increased of water lubrication will extend drill bit life considerably. Multiple Applications: The diamond drill bit can remove a complete 130mm diameter hole on glass, tiles, granite, ceramic. In addition to cutting holes compatible with glass, the comes in handy compatible with tile bottles, blocks jars, fiberglass, porcelain tile, ceramic, slate, marble, light stone. Not compatible with on Concrete or compatible with depths beyond about 1/2inch. Specification: Finish: -plated Colour:Silver Material:Diamond+45 steel Size:130mm Package Contents: 1* diamond drill bit How to : 1. Put glass drill into the driller. 2. Because this cannot locate the center, so please cutting with it slowly with 45 degrees. 3. Please cut a small mark first to locate the center, then you can cut the material vertically. 4. The speed needs to be controlled, not too fast and water is required during cutting. Attention 1. When you using the diamond drill bits, please lubrication (water). Otherwise, the diamond core drill will burn. 2. Please do not cut metal material with this tool. 3. Not compatible with on Concrete or compatible with depths beyond about 1/2inch. 4. Please keep the speed within 800-1000 per minute, low drill pressure, and increased of water lubrication will extend drill bit life. Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.