vitrified grinding wheel, cutting disc, resinoid grinding wheel for metal , stone , glass, ceramic , aluminium, ... White, Pink Fused alumina, black and green silicon carbide, used for grinding metal, stainless steel, cast iron, cooper ... thickness from 0.8 to 7mm, they are for all kinds of metal or non-metal process ... .super thin cutting disc for needle, available size 180x0.5 to 0. ...