& Material: MetalColor: SilverSuitable for use in drilling holes on glass, marble, tile or graniteThis diamond coated core milling cutter removes a complete circle from glass, tile, marble, granite, ceramic or other materials and only needs water for lubricationCan be used with a standard electric drill (not included)Always use lubrication (water), otherwise the diamond drill bit will burnStart your hole diagonally, make a circular mark, then hold the drill straight Ideal for cutting accurate holes in glass and ceramics nickel-coated diamond-coated cutters provide excellent performance on ceramic plate and similar materialThe diamond-coated diamond coating of these saws provides excellent performance and longevityTotal 5 different sizes: 5mm 6mm 8mm 10mm 12mm (5/32"), 1/4", 5/16", 3/8", 1/2")No Retail PackageQuantity: 5pcsNote:Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!