Small hook with holes for 2x 6mm diameter magnets (see below). I originally designed it (during mask-mandatory days) to hang a disposable mask off of the metal cabinet in my cubicle. Now I use it to hang reading glasses and my desk keys.

Magnets I used:

https://www.amazon.com/TRYMAG-Refrigerator-Multi-Use-Cylinder-Whiteboard/dp/B09MRN2X7L/ref=sr_1_1_sspa?crid=5BPEKZIK33PU&keywords=magnets+6mm&qid=1683909319&sprefix=magnets+6mm%2Caps%2C78&sr=8-1-spons&psc=1&smid=A1XGCQPRHKJTQ8&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExQzY5VExMMkY2OFpSJmVuY3J5cHRlZElkPUEwMTY0MTUwM0tEMDY0MEc4RUUyUyZlbmNyeXB0ZWRBZElkPUEwMDgxNzc3Mkk3NlZLOUZHWFdJSyZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

Creality

CR-6 SE

No

No

Standard

20%

I designed the holes to be tight so the magnets would not have to be glued in. I put the magnets on a table and then pushed the hook down onto them one at a time. Alternately, a small C clamp can be used to press the magnets in.