Universal replacement pad: 4.7" self-gripping replacement pad with 4 screw holes and 8 dust holes, fits most sander back pads, centered approximately 1 to 1/4" from the pad screw holes. Suitable for sanders with 4 screws: if your sander is not one of the above makes or models, please use this information to check if it is suitable for your sander, 4.7" diameter, 8 dust holes and 4 screw holes, including the distance between screws. Centre to centre hole (1-1/4"). High-quality material: these disc sander pads are made of rubber with a smooth, unbreakable surface that can be used many times over time and are excellent for sanding flat surfaces. Easy to assemble: the built-in mounting threads enable you to quickly and easily install replacement sanding pads, saving you time and effort in replacing them. Extends the life of your sander: in the package you will receive 2 x 8 hole sander pads, enough for your personal use and replacement, effectively extending the life of your sander.