Universal Replacement Pad: The 5 inch hook and loop replacement pad has 4 screw holes and 8 dust holes, suitable for most sander back pads, the distance between the hole centers of pad screw is about 30mm, please use it before use Confirm the size to purchase Suitable for sanders with 4 screws: If your sander is not the brand or model above, please check if it is suitable for your sander according to this information, 4.7 inches in diameter, 8 dust holes and 4 screw holes, especially the distance between screws. Center to Center Hole (1-1/4 inch) High Quality Material: These disc sander pads are made of rubber, with smooth surface and not easy to break, can be used multiple times times for a long time and work well on sanding flat surfaces Easy to Assemble: Built-in mounting threads allow you to install the sander replacement pads easily and quickly, saving labor time and effort on replacements. [Extend the life of your sander]: You will receive 2 pieces of 8-hole sander hook and loop in the package, the quantity is enough for your personal use and your replacement, effectively extending the life of your sander.