Description 20Pcs Diamond Coated Core Drill Bit Set 3 50mm Hole Saw Cutter for Glass Marble GraniteSpecification Material SteelSize 3 4 5 6 8 10 12 14 16 18 20 22 25 26 28 30 32 35 38 50mmQuantity 20 pcsFeatures 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 20 x Diamond coated drill bitsMore Details