Everything ingenious is simple, but there is nothing complicated in creating a grinding tool. With the help of this device you can perform various types of work, some of which even replace the file.
Craft is almost a manual planer, similar used for car body work. You will need a wooden block of a certain size and a pair of round pieces. Under the size of the planer, an emery sanding belt is opened, which should then be put on top of the bar and opened with two wooden barrels.
As the abrasive surface is abraded, the tape can be rotated. There will also be no problems with different grain sizes, you just have to stock up with emery tapes of different numbers.