Universal replacement buffer: the hooks replacement pad and 5 inch curls is characterized by 3 screw holes and 8 dust holes, adapts to most sander pads, the distance between the center of the screw holes Tampon is 1 to 7/16 inches/ 36.4 mm, please confirm the size before purchase Easy assembly: the integrated mounting thread allows you to install the sandpaper replacement buffer easily and quickly, save your efforts and your time Reliable material: these discs of discs are made of rubber with smooth surfaces, difficult to break, can be applied for a long time and several times, work well on sanding of flat surfaces Extend the lifespan of the sander: the package contains 2 parts of self-aging stamps for 8-hole sander, enough quantity to be used and replaced, effectively extends the life of the sander