best quality diamond drill bits/diamond router bit

diamond drill bits divided into sintered and coated ones, Diameter from 2mm-150mm, Threaded, Straight and cone shank, Can be used for glass, tile and stone drilling, The normal total length is 70mm,75mm 90mm and 95mm, Diamond Core Drill Bits, also know as Diamond Hole Saws, are used to drill glass,ceramics, porcelain, ceramic and porcelain tile, limestone, slate, marble, granite, stone, and fiberglass hole drilling .Size is from 2mm—150mm ,it is very easy to use , just add water for lubrication.