LotFancy Sander Backing Pads replace OE Part # 577044-01, compatible with the following models:<br> Black and Decker 11667 Type 1 Sander, 11670 Type 1 Sander, 11680 Type 1 Sander, 11680 Type 2 Sander, MS500 Type 1 Sander, MS500 Type 2 Sander, MS500 Type 3 Sander<br> Craftsman 900116700 Sander / Polisher, 900116670 Sander<br> Package Contains: <br> 4PCS backing pads<br>