Super Quality Raw Material --Using vacuum brazed technology ,which increases resistance to temperature and friction,to make the diamond particles better attach to the core steel,imporve the performance and lifetime. Constructed with high grade diamond grit for effortless cutting and improved durability in tough applications. Dry & Wet Use Hole Saw --Our diamond hole saw can be used for both dry and wet drilling, improving work efficiency and operational flexibility; Dry drilling is faster, while wet drilling helps reduce drill bit temperature and minimize wear caused by high temperatures, thereby extending its service life. Triangular Shank --The triangular shank offers stability, withstanding high pressure and torque; It prevents slippage, reduces offset or breakage, and improves drilling accuracy; Compatible with cordless drills and drill presses, it's portable and suitable for various work scenarios Wide Applications --Ideal for kitchens, bathrooms, decoration, flooring, furniture, and wall installation;Diamond core bits are worked great for dry drilling holes through hard porcelain tile, ceramics,bathroom tile,granite & marble, masonry, concrete, glass with ease. Machine --Suitable for any electric drill,hand drill,Bench Drill, When use Angle Grinder,please install angle grinder drill chuck. HUHAO Diamond Drill Bits, Dry/Wet Brazing Hollow Drill Hole Saw Kit,3 PCS Diamond Hole Saw Drill Bit Set Kit Suitable for Glass, Ceramic, Tile, Marble, Porcelain,25/40/45mm