Matt wheels polishing, especially in stainless steel workpiece. specifications: colour:blackgreen grit:36#-1500# hardness:2p-12p max speed:3000rpm diameter:100mm-400mm thickness:5mm-100mm hole size:19mm25mm32mm hole shape: roundhexagonalsquare remark:can be done as customer request function: for cleaning and polishing surface and rust, especially in stainless steel workpiece. feature: powerful cutting resistance, identical finished surface. Excellent self-shaping and nice bright. Low noise and less dust. application: stainless steel knife, scissor, tableware and vacuum flask. Metals of construction, handle, hinge, gate lock and door hinge. Wipe off the burr of golf and cue. Bakelite, wood and plastic