... 2.grit:60-800# 3.usage:automatic,hardware,stainless,wood Abrasive flap wheel:1.Material:aluminum oxide,zirconia corundun,pure cotton ... .Feature:antistatic and resistance to blocking4.usage:automatic,hardware,stainless,shipping,various kinds of irregular surface.as well inner ... relationship.Professional Production machine:Cooperative Partner:Certification: sanding wheel for polishing metal&wood