NBB Diamond Drill Bits with Round Handle, Diamond Crown, Wet Drill in Marble, Luxury Stone, Ceramic, Granite, Tile, Glass, Galvanized Tec for Bench or Gun Drills

• Each of dia.6/8/10/12/17/25mm (6pcs in total) NBB professional quality diamond drill bit with round handle, which easily connects to bench or gun drills. Standard hookup in Europe and UK.
• Total length is approx. 75 mm. Meets the vast majority of work requirements.
• 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 high quality monocrystalline diamond with proper nickel plating thickness. 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 Round Shank Diamond Drill Bits can be used directly on a bench or gun drill (with or without wire). 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. (Only the fully charged battery can ensure the working power and RPM of the drill. A low battery will affect actual RPM, even the performance and life of the drill bit). 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.