Q: What grain size of the diamond wheel is appropriate for rough,pre-finishing,and finishing?
A:It depands on the work material and other conditions:
1.For rough --- 140# or lower than 140#
2.For Pre-finishing --- 300# or lower than 300#
3.For finishing --- 400# or higher than 400#
Name: HeBei Pro Diamond Tools Co., Ltd.
Add：No.2,Jian Ye Road, Zheng Ding County,Shijiazhuang city, Hebei, China