Diamond Drill Bits, Hole Saws, Diamond Core Drills, Drill Bits/Material, Carbon Steel Drill Bit for Glass, Ceramic, Porcelain, Marble, Tile and Granite (10 pieces 8-50mm)

High-Quality Diamond Drill Bit Set: Made of high-strength carbon steel with a nickel-plated surface, these drill bits are durable and precise. The bit head has an 80-grit diamond coating, which is uniform. This greatly increases drilling speed and is sharper than other ordinary core drill bits.

10 Sizes: 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 50mm. Laser marking ensures the size meets most of your needs.

Application: Suitable for drilling holes in glass, marble, tiles, jars, ceramics, granite, stone, etc.

Design: Center pilot holes and side holes help with easy waste removal.

and the nickel plating of the surface extends its lifespan and improves its corrosion resistance. Kind Notice: When cutting hard materials, it is important to ensure that the cutter is kept cool to prevent damage to the material being drilled and premature wear of the cutter; when drilling, water is necessary for lubrication, which can extend the life of the drill bit.