<p>High quality diamond drill bits with economical, fast cutting surface Made of high strength nickel plated carbon steel makes these drill bits durable and precise; the bit tip head is made of 80 grit diamond coating, which is uniform; It helps a lot to increase the drilling speed and sharper than other ordinary saws.</p> <p> </p> <p>10 pcs mainly used sizd Contains the following diameters: 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 50mm; Using laser marking, the size will satisfy most of your different needs.</p> <p> </p> <p>Application - Suitable for use in drilled hole on glass, marble, tile, blocks jars, fiberglass , porcelain and ceramic tiles, blva0299 slate, light stone granite, etc. It works with all electric drill and impact drill.</p> <p> </p> <p>Nice design the center holes and side holes help to easily remove waste material; and nickel plated surface, extend service life, improve surface corrosion resistance</p> <p> </p> <p>Notice Type When cutting hard materials, it is important to ensure the cutter is retained cool to avoid damage to the material to be drilled and premature wear of the tool; Water is needed for lubrication when drilling, which can extend the life of the drill bit Set</p> <p> </p> <p>Diamond drill bit, hole saw tools drill bits for glass\/tile\/ceramic\/marble\/porcelain, hollow core drill bits tool diamond coated cutting blade, carbon steel 8mm-50mm 10pcs</p> <p> </p> <p>Diamond drill bit:</p> <p> </p> <p>Diamond drill bits, or diamond core bits, diamond hole saw or reconstituted diamond drill bits. They are often referred to as a Glass Drill or Tile Drill, but since they are used to drill glass, ceramic, porcelain, tile, ceramic tile, limestone, slate, marble, granite, stone and clear fiberglass, so they are more general.</p> <p> </p> <p>Product specifications:</p> <p> </p> <p>Material: steel</p> <p> </p> <p>Hole saw diameter: 8mm\/0.8cm, 10mm\/1cm, 12mm\/1.2cm, 14mm\/1.4cm, 16mm\/1.6cm, 18mm\/1.8cm, 20mm\/2 cm, 22mm\/2.2cm, 25mm\/2.5cm, 50mm\/5cm</p> <p> </p> <p>Application: suitable for stone, tile, ceramic, glass and granite processing.< \/p> </p> <p>Good performance, long life.</p> <p> </p> <p>Perfectly suitable for glass and ceramic tiles to make clean precise holes.</p> <p> </p> <p>An electric drill works best (no included in the project).</p> <p> </p> <p>Instruction:</p> <p> </p> <p>1.Diagonal Start your hole, make a round mark, then drill it.</p> <p> </p> <p>2. Always use lubrication (water), or Diamond Drill will burn.</p> <p> </p> <p>3.Through cutting concrete and tile, it is very efficient. There is more heat and it will not damage the drill.</p> <p> </p> <p>Package content:</p> <p> </p> <p>10 x diamond drill bit</p>