Hole Saw Drill Bits Set Tile Ceramic Cutter Glass Marble 5mm-12mm 5 Pcs Diamond brand new and high quality Material: Metal Color: Silver Suitable for use in drill hole on glass, marble, tile or granite This diamond coated core drill bit removes a complete circle from glass, tiles, marble, granite, ceramic or other materials and only needs water for lubrication Can be used with a standard electric drill(Not Included) for Always use lubrication (water ), otherwise the diamond core drill will burn Start your hole diagonally, make a round trace and then hold drill straight Perfect for Cutting Accurate Holes in Glass And Ceramics Heavy duty hole saws plated with nickel with diamond coating gives superior performance on ceramic tile and similar material The Diamond Coating on These Saws Give Superior Performance and Life Total 5 different sizes: 5mm 6mm 8mm 10mm 12mm (5/32", 1/4", 5/16", 3/8", 1/2") No Retail Package Quantity: 5 Pcs Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!