Diamond Dry Core Bits - 10 Pack 6mm Diamond for Quick Drilling of Hardest Materials, Porcelain, Tile, Granite, Concrete, Ceramic, Marble, Stone, Glass, BrickDrills like a ceramic and tile diamond drill, cuts tile smoothly with minimal risk of cracking or chipping, and is friendly to expensive precision materialsDecent Diamond Core Bit - Great for drilling holes in bathroom tiles to install shower doors, water filters in kitchens, and hobby projects in planters, vases, or mason jarsDry Drilling Hollow Bits - These 6mm diamond coated hollow bits are filled with wax inside to the bit while dry drilling; it can also use the side of the bit to enlarge the holeACCURATE TO THE DETAIL - Each core drill has depth markings for precise projects; 1/4 INCH round is compatible with most hand drills, vertical drill presses.Material: diamondcolour: blackPackage Contents:10 x diamond drill bitsOnly 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.