The main benefits of Aluminum oxide quick-change discs: Thanks to Aluminum oxide,they are fit for a wide range of work ... surface. Our company may produce Aluminum oxide quick-change discs.Thay may be used for mould ... ,460,450,457620.000100JY10JY10JY10JY10JY10JY100,760,730,710,690,660,65 Aluminum oxide quick-change discs(Sanding Disc )