100% new and high qualitymarble Ceramic tileThe crown jewel is suitable for drilling ceramic, glass, marble, slate and porcelain tile up to grade 5Always use lubrication (water), otherwise the diamond core drilling will be burnedCooling and lubricationWhen the cutting of hard materials, it is important to that the cutter is kept cool to avoid damaging the hole material and premature wear of the cutting.The use of water as a coolant / lubricant prolongs the life of these saws.If you drill on a vertical surface to try one hand water spray, or a sponge soaked in water and kept under, but in contact with the drill.Keep the little 'wet as much as possible during operation, if the bit dried out during use, it may overheat and just boring.Diameter: 110mmPackage Contents:1 x spearheadOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.