Shank: 5/8"-11 Thread,for Angle Grinder,Diameter:50mm(2 Inch),Chamfer Angle:Top Angle 60 degree,Total length:82mm,Workable length:72mm Application:This is a versatile diamond milling finger bit, designed to Wet or Dry Chamfer Enlarge, Shape, Polish,Clean,Trim,Finish,Round or Bevel Existing Rough Holes of Marble Ceramic Porcelain Tiles Granite Stone Features:You can easily produce 0-50mm hole size with just One Standard Diamond Core Bit Plus one Diamond Chamfer Cone Tile Bit, cost-effective Quality & Technology: Diamond Grains #50/60 ensure sharpness of milling and excellent finish,vacuum brazed technology improve product performance and long service life Recommend Machine:Angle Grinder,the recommended speed is 6000rpm, and the maximum speed is 11000rpm. if you want to fit our hole saws on drills or other machine, you need an adapter, such as SDS,Hex, Round Plus Shank