This is designed to work with the 15mm acrylic sanding blocks from GodHand, but you could use it for anything. The genius behind this product is that it has strong adhesive on the top and slightly weaker adhesive on the bottom. This means it will grip your sandpaper or emery cloth exceptionally well, while still being easy to remove from the board when it is time. It wont even leave any residue behind. 15mm wide and 30m long.