https://hackaday.io/project/168314-pcb-badge-holder
Badge Holder made with PCBs for the real HW engineer
badge holderpcbhackadayio
https://www.instructables.com/3D-Printed-Holder-for-PCB-Etching/
3D Printed Holder for PCB Etching: If you like to make your own PCBs at home, you going to need something to hold your PBCs when they are submerged in acid....
printedholderpcbetchinginstructables
https://www.conrad.com/en/p/tru-components-tc-cs-1219203-pcb-holder-polyamide-distance-19-1-mm-1-pc-s-1593450.html
Top TRU COMPONENTS Selection | Order easily now: TRU COMPONENTS TC-CS-1219203 PCB holder Polyamide Distance 19.1 mm 1 pc(s) | Fast delivery | Reasonable prices
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https://www.printables.com/model/1006490-voron-rgb-daylight-18-pcb-led-holder-2020-diffusor
voronrgbdaylightpcbled