I needed a sanding tool to get to confined spaces, it is also good to have a little manually sanding tool when sanding down parts you do not trust power tools are accurate enough to perform the jobPrinter Brand: UltimakerPrinter: Ultimaker 2Rafts: NoSupports: NoResolution: 0.2Infill: 40%Notes: What you need for the tool: assembly: If thread rod is used, you need a piece M4 locking nut. Screw it onto the threaded rod so that the threaded rod comes out of the nylon ring on the locknut. (no need to think about locking nut if M4 Hex head bolt is used) Use a standard M4 nut which you insert into the "nut trap". Use M4 bolt / Threaded rod with lock nut and slide through nut and FINGERSANDER_FOOT, screw it through M4 nut that is "nut trap". You will now have the opportunity to fasten sandpaper to the tool. See photos for references / / Sandpaper: Buy sandpaper on a roll and cut to the right length and the right width (20.5 cm x 2.4 cm) A roll of sandpaper will last a long time.