Monster 1-5/8 in. Brazed Diamond Core Bit/Hole Saw for Granite, Quartzite, Marble, Concrete, Porcelain, Ceramic and Other Stones BDBP0158 - The Home Depot
97mm Diamond Starrett Hole Saw Tooth Core Drill
15PCS Diamond Hole Saw Kit 15 PCS Diamond Drill Bits 1/4 to 2 Inch Hollow Core Drill Bits for Drilling Glass, Stone, Porcelain, Ceramic Tile ,Marble ,Pots, Bottles - Newegg.com
Diamond Hole Saw, 15 pcs Diamond Drill Bits Set Glass Drill Bit Extractor Remover Tools for Glass, Ceramics, Porcelain, Ceramic Tile (1/4"-2") - Amazon.com