Review on Enhance Your Sander's Performance with Black & Decker FS500 Sander Replacement Foam Backing Pad (2 Pack) #584741-00-2pk by Dan Olsen

Perfect fit and great economy. I bought 2 pads here for less than half the price on the official website for one. Don't worry if it fits as all the holes match and my grinder is like new. Some commenters have complained that the sandpaper is difficult to apply. It's like the mill is brand new. The pads have shrunk with age and we have gotten used to the "extra" sagging of the paper and have to be careful again for a while. The installation brought no surprises. I unscrewed 4 screws and then scraped the old block off with a spatula. I used some lacquer cleaner on the old fabric to finish the surface to ensure good adhesion, then peeled off the paper and stuck on. You have to be careful and pre-align the lining as it's not exactly square and once glued it's there. Make sure it is centered as you will have to struggle applying new paper for a while until these pads "wear out".