Comments On Jan 21, 2015:Although I have used these for just one project, I like them. They are more flexible than the green disks that I have been using. I was able to get concave sanding done without getting edge marks from the disks on the adjacent surfaces (I used a thick soft pad behind the sanding disk). The only drawback that I can say is that the GRIT was not clearly marked on the back of all the disks. The first thing I had to do is open each package and CLEARLY MARK the grit on the back of each piece with a marker.
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