Granule degree #46 60 80 100 120 150 180 Abrasive stainless steel, Hardness steel, Alloy metal. AC#Granule degree #46 60 80 100 120 150 180 It is suitable for general metal,steels, stainless steel, casrt steel and weld seam, aluminum. GC#Granule degree #46 60 80 100 120 150 180 It is specially suitable for grinding glass and marble.