Do you have the following problems when punching?❌Wires next to it, can't safely add water❌Drilling at high altitude, inconvenient adding water❌Glass/jade is slippery with water and can't be hit. Choose our self-cooling diamond dry drill bit to help you solve the problem easily. Meet your actual needs Diamond drill bit integrated with high-quality cooling wax, Water-free dry drilling, vacuum brazing technology and high-quality diamond grains commercial will deliver high working efficiency and long time productivity. When remodeling two bathrooms with porcelain tile, I had to drill a few holes in the tile for the glass brackets/clamps of the panel. I went through four or five bits And a lot of time drilling the first three panels. I bought them for the last panel and drilling was much, much faster and easier. I drilled 10 holes with one bit And it was still in relatively good shape when I was done.-Elias MambergMain Features► For dry drilling designDiamond drill bit integrated with High-quality cooling wax Lubricant inside, which melts during dry drilling and cools the cutting surface; No need to add water, which can effectively reduce the temperature of the drill bit and increase the service life of the drill bit.► Efficient drilling, Original high-quality wax head material, Coarse brazing sandpaper, Excellent durability, sharper drilling and higher efficiency.► Practical hexagonal shank design► Adopts a hexagonal universal adapter, which is suitable for all kinds of drills and is more practical.► Unique detailsThe diamond coating increases drilling speed; Using the links on the side of the flute help to remove debris and drill holes smoothly and quickly; Depth mark Useful for precise design.► Wide Application Can be used for ceramic tiles, ceramics, glass, marble, granite, quartz, agate, jade, crystal stone, microcrystalline stone, etc. Specifications: ☺Material: brazed diamond☺Product weight: 40g☺Size: ☺Package Content: Self-cooling diamond dry drill bit x 1NoteDue to manual measurement, please allow slight deviation in measurement. Due to different display and lighting effects, the actual color of the item may be slightly different from the color displayed on the pictures.