Mainly used for metal rods to polish.including: copper rods, stainless steel rods, aluminium rods, sticks, plastic round rods. 1 Applicable for the polishing of metal pipes/rods (working diameter: 1mm-30mm).2 application: copper rods, stainless steel rods, aluminium rods, sticks, plastic round rodsincluding: copper rods, stainless steel rods, aluminium rods, sticks, plastic round rods.3 special ...