Magnetic Key ring
cults3d
Easy to print and to use. Need 4 cylinders magnets (6mm x 6mm) https://www.aliexpress.com/item/1000007723689.html?spm=a2g0y.search0104.3.2.4f2c742fM8hP5Q&ws_ab_test=searchweb0_0%2Csearchweb201602_1_10065_10130_10068_10547_319_317_10548_10696_453_10084_454_10083_10618_10307_537_536_10131_10132_10133_10059_10884_10887_321_322_10103%2Csearchweb201603_52%2CppcSwitch_0&algo_expid=6fd5bcb7-925a-4dd8-8921-51836e2f9a93-0&algo_pvid=6fd5bcb7-925a-4dd8-8921-51836e2f9a93&transAbTest=ae803_5 I've stuck it on the door by double-sided tape (Gorilla Tape)
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