Grinding wheel /grinding stone Abrasive:A ,WA,PA,,GC Grit NO.:46#,60#,80#,100#, ... iron..GC are suitable for aluminum,copper,cast iron and stone..WA and PA are suitable for stainless steel and alloy ... ,all kinds of molds,parts,chamfering,precious stones ,jade processing abrasive polishing. Grinding stone /grinding wheel