8 dust collection holes.High-density and uniform hook provide strong stickness and a long service life.The 5inch hook-&-loop pad is the direct replacement for pad part DWE6423 and N329079, working with models DWE6423/6423K, DWE6421/6421K, DCW210B random orbital sander.Product name: Sander Backing PadsType: 5 inch 8 dust collection holesSize: 125mm/5inchColour:black+blueMaterial:PUPackage Contents:3 x Backing PadNote: There is a slight colour difference in the physical product, please don't mindOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.