Description:6pcs 6mm Diamond Hole Saw Cutter Drill Bit for Tile Ceramic Glass Porcelain MarbleSpecification:Material: steel Size: 50mm\/1.97"(length) x 6mm\/0.24"(hole size)   Features: --Ideal for drilling ceramic tiles、 glass、 marble、 slate and porcelain tiles up to hardness grade 5. --Diamond hole saw tile ceramic glass porcelain marble drill. --Need Cooling and lubrication、always use lubrication (water) 、 otherwise the diamond core will over heat.   Use method: 1.Clamped firmly to a bench to allow for slow controlled drilling. 2.Make a template from a piece of timber or waste material、 locate this over the area where you want to drill your hole and use it as a "guide" to start the hole. 3.Once you've got into the surface by 1mm to 2mm you can remove the guide and continue to drill in a controlled manner. 4.Start your hole diagonally、 make a round trace and then hold drill straight.  Package Included:6 x Diamond Hole Saw More Details: