Ryobi 039066005051 Sander Pad Assembly, Pack Of 2 Genuine OEM Ryobi Part. Replaces Old Part Number: 039066005023. Fits Various Ryobi Sander Models Including: S652DK 1/4 Sheet Double Insulated Sander,S652D 1/4 Sheet Double Insulated Sander, S652DG 1/4 Sheet Double Insulated Sander. The Pad Is What The Sandpaper Is Attached To By The Clamps On The Platen Assembly.