4 Inch Diamond Core Drill Bit for Porcelain Tile Ceramic Marble Granite Drilling, BRSCHNITT 1pc Vacuum Brazed Diamond Hole Saw with 5/8-11 Thread (100mm) Size --1pc 4"(100mm), diamond height 10mm, total length 60mm, 5/8-11 thread of the tile drill bit Wide Application --Diamond core bits are worked great for dry drilling holes through porcelain tile, ceramics, bathroom tile, marble granite, stone, masonry, brick with ease, using water could prolong the lifetime 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, improve the performance and lifetime. Constructed with high grade diamond grit for effortless cutting and improved durability in tough applications. High-quality core steel body helps to be more efficient and durable, not easy to deform Fast And Smooth Drilling --Special U-groove tooth shape and chip removal design of the tile hole cutter creates a high sharpness, you could drill smoothly with no broken edges Machine --angle grinder (direct connection) or electric drill (with adapter)