Each ceramic tile with removable center guide bit - no guide tool required 75mm/50mm diamond with three layers of diamond coating to performance Cutting depth: 1 3/8 inch - increase the height of the body to achieve cutting Triangular - standard 3/8 inch of standard drill bit Drill through 3cm thick countertops, , quartz, granite, and ceramic tiles, glass and light stone Note: It is necessary to add water for cooling in the whole process, and it is forbidden to drill tempered glass color:Silver Material:Metal Package Contents: 1 x 3 Inch 1 x 2 Inch Only 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.