1Effective Sanding: These disc sander pads are made of rubber, have a smooth surface and not easy to break, can be used for many times for a long time, effective when sanding flat surfaces 2Easily Quickly Install: The built in installation thread can easily and quickly install the replacement pad of the sanding machine, which saves replacement time and effort 3Multi Holes: The 5in hook and loop replacement pad is characterized by 4 screw holes and 8 dust proof holes, suitable for most sander back pads 4Compact Layout: The distance from the center to the center of the cushion screw hole is about 1 to 1/4 inch, which is suitable for most sanders with 4 screws 5Scratch Resistance: Good quality ABS material possess impact resistance, scratch resistance, and environmentally friendly