Swichable Permanent Magnet
thingiverse
You can find a video about this here https://youtu.be/AygyCYMVXlIand to finish it you will need 12 x M12 nuts, 12 x neodymium magnets 10mm by 5 mm round and apiece of 8mm rod
Download Model from thingiverse
With this file you will be able to print Swichable Permanent Magnet with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Swichable Permanent Magnet.