I like the Skadis Holder from @DDDavid ( https://www.printables.com/de/model/280606-skadis-side-cutter-plier-holder/files ).
I have many ideas for more holders on Skadis-Walls, but there are no construction files. So I started FreeCad and built an universal-clone. The Allen key holder is only used to show, what is possible
The Universal Hook is built by fCSD_Salzburg (Thingiverse)
https://www.thingiverse.com/thing:2853261
The author remixed this model.
I built a complete clone with Freecad