[Compatible Models] Sander pad replaces for Part Number#300527002; for Part Number# 51-36-7100, Compatible with for RS290/RS240/RS280/RS280VS/RS281VS/P411, for 6021-21/6034-21; for R2600/R2601; for ROS Model 315 Random Track Sander [Extra Hard Backing] Our pad's backing is thickened and much harder than others. So, it's very difficult to be broken. [High-Density Hook] High-density and uniform hook provide strong stickness and a long service life. [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 Designed for sanding flat surfaces. construction for , Hook & loop design for quick abrasive paper changes. COMPATIBLE WITH: 1. For RS290, RS280VS, RS281VS, P411 Random Track Sander 2. For R2600 and R2601 Random Track Sander 3. For 6021-21 & 6034-21 Track 4. For ROS Model 315 Random Track Sander 5. For 315.112170, 315.116940, 315.116950, 315.112180, 315.279870 Random Track Sander If the model is not mentioned above, you can check your sander replacement pads to fit the following size: 5-inch dia, 8 holes and 4 screws, ESPECIALLY the distance between screw holes(1-1/8Inch)center to center and the screw hole's dia(11/32Inch). PLEASE CHECK THE SIZE OF YOUR SANDER/ REPLACEMENT PAD BEFORE ORDER. Note: 1. We do not research and use every model, as long as the hole positions are correct, there should be no 2. Mounting screws are not included. Colour:Black Material:PU Size:5 inches Package Contents: 4 * Sanding Disc Backing Pads 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.