【Size】Hex Shank 8.3mm; Chamfer Diameter 2''(50mm); Total length 73.5mm; Working length 43.5mm; Diamond Grit #80/100; Top angle: 60 degrees 【Application】Desinged to shape, enlarge and round bevel existing holes in Tile, Porcelain, Hard Ceramic, Granite and Marble. Also easily create round shape indentation to accommodate pipes or electric wire lines 【High Performance】High-quality diamond and vacuum brazed technology help to be durable and have a long sevice life 【Save Money Tools】With just one standard diamond core drill bits and a beveling chamfer bit you are able to create many different hole sizes(0-2''), without needing to buy several different core bits 【Attention】The diamond bit can not be used to drill holes, but to enlarge, shape and trim the existing holes. Diamond beveling chamfer bits suitable for Corded Drill, Cordless Drill, Benchtop Drill. Recommended speed: 2000-5000RPM; Faster the RPM, longer the drill bit's working life. When use Angle Grinder, please install angle grinder drill chuck