[Compatible Machines]: The 5 inch hook-&-loop sander pad is compatible with DWE6423/6423K, DWE6421/6421K, DCW210B random Trackal . It's the direct replacement for pad part number DWE64233, N329079, RSP54. [Metal Backing]: The metal backing is much the plastic backings. It is harder and more difficult to be broken. [High-Density Hook]: High-density and uniform hook provide strong stickness and a long service life. [Soft Rubber]: High-quality and soft rubber can reduce vibration from Trackal sander for improved results. [Easy Installation]: Easy screw-on Installation. Attaches easily and hassle-free. NOTICE: the screws are not included. You can use the existing screws on your sander. Color: silver material: metal Package Contents: 2 * Sander Pad Only 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.