I've needed a complete set of 3" sanding and polishing pads that I could attach to my drill. I have a larger set, but this set is perfect for what I was looking for. The set has 12 different grits ranging from 60 grit all the way to 10,000. I'm using several of the grits on some wood projects I'm building and will be using them on an epoxy table next. It comes with both 1/4" and 1/8" shanks as well as polishing pads and backing pads. So far, the sandpaper is working out well for me and doing its job nicely.