Compatible: Our sanding pad is a direct replacement for the pad number DWE64233 and N329079, and is compatible with DWE6423/6423K, DWE6421/6421K, DWE6421-B2, DWE6421-B3, DWE6421-BR, DCW21B1. Please check whether it is suitable for your sander before buying. Standard size: Outer diameter: 5 inches (125mm), inner diameter: 50mm, applicable disc diameter: 5 inches (125mm), thickness: 11mm. : Easy installation and disassembly, installation and use will not fall off, convenient to replace, save time and improve work efficiency. 8 dust holes: The grinding pad with 8 dust holes has a complete dust collection system. Super convenient dust collection function, 8 dust collection holes can suck dust and debris into the dust bag assembly. Easy installation: Built-in 4 mounting screw holes, installation is quick and convenient, and increase the sandpaper grip. But screws are not included, you should prepare screws to install it. Material:Plastic + Sponge colour:black Package Contents: 2 x Sanding Pad Only the above package content, other products are not included. Note: Light 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.