Description 10Pcs Diamond Coated Drill Bits 3 50mm Hole Saw Cutter Set for Glass Marble GraniteSpecification Material SteelBit coated Diamond coatedSuiface treatment Nickel platedHole cutting sizes 3mm 4mm 5mm 6mm 8mm 10mm 12mm 18mm 32mm 50mmFeatures 1 This diamond coated core drill bit removes a complete circle from glass tiles marble granite ceramic or other 2 Materials and only needs water for lubrication 3 Always use lubrication water otherwise the diamond core drill will burn 4 Works better with a electric drill5 Start your hole diagonally make a round trace and then hold drill straight Package Included 10 x Diamond coated drill bits for glass marble graniteMore Details