Each ceramic tile with removable center guide bit - no guide tool required75mm/50mm diamond with three layers of diamond coating to performanceCutting depth: 1 3/8 inch - increase the height of the body to achieve cutting Triangular - standard 3/8 inch of standard drill bitDrill through 3cm thick countertops, , quartz, granite, and ceramic tiles, glass and light stoneNote: It is necessary to add water for cooling in the whole process, and it is forbidden to drill tempered glasscolor:SilverMaterial:MetalPackage Contents:1 x 3 Inch1 x 2 InchOnly the above package content, other products are not included.Note: Light reflection 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.