The case was designed for my daughter who is fond of manicure. The question arose about storing and transporting cutters. As the loop core, we used a filament rod cut with a diameter of 1.75 mm. The fixation magnets are glued on super glue and stick well. There are magnets with a central screw hole; for this, screw holes are laid in the cases. Printed with PLA plastic from FDPlast. Cap filling 100%. The lower part is 20%. Cutters: http://alii.pub/5yzssp : http://alii.pub/5yzswz Magnets: http://alii.pub/62yat4