Ryobi S652DK 1/4 Sheet Double Insulated Sander (4 Pack) Replacement Pad Assembly # 039066005051-4pk, Model: (Tools & Outdoor gear supplies) Includes (4) 039066005051 Backing Pads New, Bulk Packed Genuine Ryobi Replacement Part Consult owners manual for proper part number identification and proper installation Please refer to list for compatibility