The BBTec FB750W Diamond Tile Core Bits are premium diamond tile bits for ceramic and porcelain tile, glass and natural stone. They offer extreme bit life, accurate chip free cutting of the hardest tile and stone, silica dust free drilling and at unparalleled drilling speed. These premium quality diamond tile bits offer the latest in diamond bit technology and are unparalleled in drilling speed and quality, furthermore they offer an amazing bit life of at least 200 holes per bit and often even more. This line of core bits covers all common diameters from 4mm up to 68mm. These premium quality diamond core bits are an integral part of the BBTec diamond drilling range.