... surface of wooden,stainless, aluminium Easy fitting,long life Cup brush abrasive wire has different specifications:1.Thread: M14x1.25 M14x1.5 ... :carbon steel wire:0.3,0.35,0.5mm6)AO:Abrasive filaments,oxide aluminium ,80grits,120grits and etc.7)SIL ... :Abrasive filaments,Sillcon carbide,80grits,120 grits, and etc.5.package: ...