vitrified grinding wheel, cutting disc, resinoid grinding wheel for metal , stone , glass, ceramic , aluminium, stainless steel, vitrified wheels ... Fused alumina, black and green silicon carbide, used for grinding metal, stainless steel, cast iron, cooper, marble and granite, porcelain ... to 7mm, they are for all kinds of metal or non-metal process.super thin cutting disc for needle, available size ...