... you hard and smooth Surface Fast,long life,safe,chip free good price Jiu Feng Diamond Tools CO., LTD ... 1. Specifications marix/ body65MnGrit36# 46# 80# etcDiametercustomboudmetal 2. Applicationsused in , glass, stone and other hard brittle materials grinding process,etc 3 ... concerning data, like lenth.Since diamond tool is consuming in using, there is no warranty covered concerning standard product. ...