Review on 3M Scotch Brite Radial Bristle Discs by Tim Crowder

5 pack The 5 pack is less than a quarter inch high, I photographed it next to the toothbrush to give an idea of actual size. To get the stack shown in the photo you need at least 20 or so (IMO). I'm returning this item as it's overpriced, especially when you add a mandrel which you have to buy extra to make it work on your drill.