Compatible with the following models: DW421 Type 1 Random Orbit Sander , DW421 Type 2 Random Orbit Sander , DW422 Type 1 EVS Random Orbit Palm Sander , DW423 Type 1 15 inch EVS Random Orbit Sander , DW423 Type 2 15 inch EVS Random Orbit Sander , D26441 Type 1 Sheet Sander , D26453 Type 1 Random Orbit Sander , D26450 Type 1 Random Orbit Sander , D26451 Type 1 Random Orbit Sander , 2771 Type 1 5 Random Orbit Palm Sander , 27708 Type 1 5 Random Orbit Sander With EVS , 27707 Type 1 5 Random Orbit Sander 25708 Type 1 5 Variable Speed Orbital Sander