Yosoo 14pcs Diamond Drill Bit Set 3-70mm, Wet Use for Tiles, Glass, Fish Tanks, Marble, Granite, Ceramic Easy to use, high quality,good performance, long life - Excellent for making clean and accurate hol This diamond coated core drill bit removes a complete circle from glass, tiles, marble, granite, cer Do NOT run dry. Diamond Coated Tools will work best if you use water to keep the tools cool. Size:3mm, 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, 18mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm(you can see the Package Includes: 1 x 14pcs Diamond Coated Hole Saw Drill Bits