Usage Tips:2 Pieces 125mm 8 Hole Hook And Loop Orbital Sander Pad Replacement Sanding Pad (blue) Universal Replacement Pad: The 4.7 inch hook and loop replacement pad features 4 screw holes and 8 dust holes, fits most sander backing pads, the distance between center and center of pad screw holes is about 1-1/4 inch, please confirm the size before purchase Suitable for sander with 4 screws: if your sander is not the above brand or model, please check if it fits your sander based on this information, 4.7 inch in diameter, 8 dust holes and 4 screw holes, especially the distance between screws. center-to-center holes (1-1/4 inch) Quality material: these disc sander pads are made of rubber with smooth surfaces, not easy to break, which can be applied for a long time and many times, work well on sanding flat surfaces Easy Assembly: Built-in mounting thread allows you to install the replacement sander pad easily and quickly, saving you money your time and effort to replace it Prolong the life of the sander: you will get 2 pieces of 8-hole sander hook and loop pads in the package, enough quantity for your use personnel and replacement, effectively extending the service life of the sander