COMPATIBLE MACHINES: The 5" Hook and Loop Sander Pad is compatible with Milwaukee Milwaukee 6021-21, 6034-21, 2648-20, 2648-21 Random Orbit Sander. WHAT'S MORE, the universal sander pad can replace most common sander pads with 5 dia, 8 dust holes and 4 screw holes. Whatever brand it is, if your 5 original pad has the same pattern and the distance between screw holes center to center is 1-1/8, it will fit definitely. 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. Save Money The sander pads wear out before the machine does, so replacing the pads is a cost effective option. Save your old sander from garbage can and extend their life.