I urgently needed 20 mm double-sided tape for pasting polystyrene foam disks, which I cut here • Крутой резак с резистором для пенопласта ... on a homemade cutting device, but now 20 mm. As often happens, the store did not have this width. Only 50 mm was available. Cutting with scissors or a knife is a thankless task, and it will be uneven and the edges will be crooked. I had to quickly make a small device and cut it into 20 mm thick. It turned out just perfect! I did it on a lathe, but in principle a drill with speed control or a screwdriver will do.