General description Universal Replacement Pad: The 4.7 inch (125 mm) replacement pad with velcro fastening is designed with 4 screw holes and 8 dust holes, making it compatible with most sanding pad backing pads. The distance between the center and the center of the pad screw holes is approximately 1-1/4 inch, so please confirm the size before purchasing. Technical specifications Diameter: 4.7 inches (125 mm) Number of dust holes: 8 Number of screw holes: 4 Distance between screw holes: 1-1/4 inch Installation Built-in mounting thread allows for easy and quick installation of the sander replacement pad. Usage Works well on flat sanding surfaces. Can be applied for a long time and multiple times. Other information Package includes 2 pieces of 8 hole sander velcro pads. Quality Material: Made of rubber with smooth surfaces, not easy to break. Effectively extends the life of the sander.