The fastest way to fasten/unfasten a lace-up shoe.
You need 3 neodimium magnets of 12 mm in diameter and 5 mm in height for each piece (12 for the complete set). In the EU you can purchase at Supermagnete.
On each piece, insert the magnets with the same pole up and in the opposite with the same pole down. To facilitate the operation, mark the faces of the magnets with a marker.
Once the pieces are printed, insert the magnets into the holes and glue the lids with acetone or PVC cement (if it is ABS).
This design avoids to some extent the impact of the magnets and their possible deterioration over time.
download the files on: http://www.thingiverse.com/thing:2152431
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