424057-1 for Makita models M9400B, 9403, MT190, and MT9. It serves as a lubricating and protective component for the sander, equipped with three holes for effective dust collection. It's an ideal replacement back pad for the sander, suitable for use with both sandpaper sheets and adhesive-back sheets and rolls. Installing it is a straightforward process, requiring the removal of the mounting screws to replace the pad.
