NBB Brazed Diamond Drill Bits with Hex Shank 12.5mm, Diamond hole saw for Dry or Wet Drilling on Porcelain, Ceramic, Tile, Granite, Marble, Used on Corded or Cordless Pistol Drill or Bench Drill(54mm)

• 1pc of dia.54mm NBB VB diamond drill bit in Professional Quality and Classic Gold color with 12.5mm HEX shank, easily attaches to universal pistol drills (Both corded and cordless pistol drills are accepted. It can also be used on bench drill). Never needs to choose a machine for a drill bit.
• Appropriate size designed after thousands of testing experience. For dia.16-150mm, total length is approx. 65mm with approx. 30mm drilling depth. It meets the vast majority of work requirements.
• Easy operation, applied for DRY or WET drilling. It can work in all conditions. The perfect tools are at your fingertips. You can also do the same great work as a master!
• Multiple applications: drilling on HARD PORCELAIN, CERAMIC, TILES, GRANITE, MARBLE... A new generation of diamond technology enables high work efficiency and time savings.
• Durable and stable serving life, one NBB VB diamond drill bit allows a much longer working life than the nickel plated one (almost 8 times). SAVE your money and ALLOWS you to create more. (You can drill much more holes in wet condition).

NBB Vacuum Brazed (VB) diamond bits are professionally manufactured for dry or wet drilling on all types of hard porcelain, ceramic, tile, especially porcelain stoneware and other cladding materials such as marble and granite, with high efficiency and a longer life. With our special VB technology, NBB VB diamond drill bits in HEX shank can be used directly on a CORDLESS PISTOL DRILL (a corded pistol drill is better). The recommended RPM to use will be 2,000RPM to 3,000RPM (with higher RPM than 2,600RPM, the performance will be also better). ATTENTION: 1. When you use the NBB VB diamond drill bit, NEVER apply the hammer mode. 2. Before making a new perforation, MAKE SURE that the bit is installed on the machine correctly, firmly without any vibration. 3. MAKE SURE the RPM of the machine is above 700RPM. 4. If the NBB VB diamond drill bit is used on a CORDLESS machine, MAKE SURE the battery of the pistol drill is fully charged before drilling. (only the fully charged battery can ensure the working power and RPM of the machine. Low battery will affect the actual RPM, even the performance and working life of the NBB VB diamond drill bit.) According to our test experience, the normal 1.5Ah lithium battery cannot end the life of the NBB VB diamond drill bit. , so a new battery must be replaced promptly.(4,0Ah Li-lon battery will be better) 4. DO NOT apply horizontal force when drilling in the vertical direction, otherwise the drill may bend and affect the performance! NBB VB diamond drill bits has the wax cooling system, which allows it to dry drilling on ceramic. Water will help to extraly extend the working life. The drilling depth is about 32mm (for dia.5-6mm)/ 40mm(for dia.8-16mm). NBB VB diamond bits can be used to drill the necessary holes for water inlets, drains, light points, etc.. All data are measured manually, so there may be some deviations. Please understand.