
Magnetic Spinner caps
thingiverse
Fidget spinner caps that snap together securely using 6mm x 1.4mm magnets can be easily removed when needed. A cone-shaped divot also helps keep them firmly in place on fingers. The small magnets used are available from KJMagnetics, a current surplus supplier at http://www.kjmagnetics.com/proddetail.asp?prod=ZD1.
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