chiba roundusage:Suitable for all kinds of irregular shape surface and ordinary flat grinding,Website:http://www.chinaabrasivegrinding.com, cleaning and polishing.Widely used in automobile manufacturing,heavy machinery,ships,aluminum alloy,stainless still,hardware and decoration and other industry.With good effect in polishing and grinding of metal industry and inner holecharacteristics: sharp, safety, environmental protectionspecification: outer diameter(2" – 20'')× thickness(3/4" – 7")× hole diameter(25.4 – 170mm)partical size: A40 – A600(Z36 – Z120\C40 – C600)