New 10pcs 3mm-20mm Tile Ceramic Glass Marble Coated Drill Bit

brand new and high quality This 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. for Always use lubrication (water) otherwise the core drill will burn. Start your hole diagonally make a round trace and then hold drill straight. Size: 3mm 5mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm Quantity: 10 pc 　 NOTE: Please allow 1-2mm differs due to manual measurement thanks. Due to the difference between different monitors the picture may not reflect the actual color of the item. Please understand Thank you!