Dremel 562 - Carbide Tile Cutting Bit — widgetsupply.com
Diamond Burr Set for Dremel, Rotary Tool Grinding Cutting Wheel Stone Glass Tile Jewelry Engraving Rock Etching Masonry 1/8” Die Grinder Carving Cutter Metal Engraver Kit - 32pc Set - Amazon.com
Rotozip X-Bit 5/32 in. Rotary Tool Tile Cutter Bit for Underlayment, Hardboard, Fiberock and Cement Board XB-TC1 - The Home Depot