NBB Diamond Drill Bits with Triangle Shank, Diamond Crown, Wet Drill in Marble, Luxury Stone, Ceramic, Granite, Tile, Glass, Galvanized, in Cable Drills or Cordless (38mm)

• 1pc dia.38mm NBB professional quality diamond drill bit with triangular handle, which easily connects to bench or gun drills. With central carbide tile bit and special sponge for irrigation feed. Carbide central drill can be used separately and can be used for centering. Before drilling, make sure that the sponge is wet enough, so that during drilling, it can help cool and moisten the condition.
• Reasonable size designed after thousands of testing experiences. For 20-100mm, approx. 75mm total length with approx. 35mm drilling depth. It meets the vast majority of work needs.
• Easy operation, applied for wet drilling. By the stable drilling efficiency of bench drill and continuous water feeding, it can realize good drilling with beautiful finish. Perfect tools are at your fingertips. You can also do the same great job as a master!
• Multiple applications: drilling in marble, gemstone, ceramic, granite, tile, glass... The outstanding diamond layer allows high working efficiency and time saving.
• Durable and stable service life. NBB electroplated diamond drill bits apply the high quality monocrystalline diamond with the right thickness of nickel-plated. They make possible a lasting working life and high working efficiency. SAVE your money and ALLOW you to create more.

NBB Electroplated Diamond Drill Bits (ELE) are professionally manufactured for wet drilling marble, granite, glass, glass, ceramic, tile and other materials such as marble and granite, with high efficiency and long service life. br> NBB ELE triangular shank diamond drill bits can be used directly on a bench or gun drill (with or without wire). With central carbide tile drill bit and special sponge for irrigation feeding. Carbide center drill can be used separately and can be used for center. Before drilling, make sure that the sponge is wet enough, so that during drilling, it can help cool and moisten the condition. Recommended RPM to use will be from 700 RPM to 3000 RPM (with RPM above 2600 RPM, performance will be better). ATTENTION: 1. When using NBB ELE diamond bit, NEVER apply hammer mode. 2. Before re-drilling, MAKE sure the drill bit is installed correctly on the drill, firmly and securely. No vibration. 3. MAKE SURE drill RPM is above 700 RPM. 4. If NBB ELE diamond drill bit is used in a WIRELESS gun drill, MAKE sure the drill battery is fully charged. loaded before drilling. According to our test experience, a 4.0Ah lithium battery is better than normal 1.5Ah lithium battery. 4. DO NOT apply horizontal force while drilling in vertical direction, otherwise the drill bit can bend and will influence performance. When drilling, feed the continuous water to cool the temperature and prevent dust from escaping. It will help extend the life of NBB ELE diamond drill bit. VB diamond drill bits can be used to drill the holes needed for water intakes, drains, light points, etc. All data are measured manually, so there will be a certain deviation. Please understand.