... cutting efficiency higher, working life longer, cost lower and performance higher.Feature:Diameter: 25-100mm Thread size: ... more sharp,what’s more,the grinding force and the grinding temperature will be apparently decreased.3, ... , Cutting granits,concrets,rebars,ceramics,glass,woods,plastics and so on,which is highly efficient.6, Strong ... in the east-China. Diamond Brazed drum router and milling bits