Easy release hook, holds very well when under weight, didn't properly test it, but it can hold several kilograms easy.
To build it, you need:
2x Screw A
1x Screw B
(optional) 1x Screw C
1x Hook A
1x Hook B
1x Clamp (dual screw version for better grip, in that case you need Screw C as well)
For a bigger hook, exchange "Hook A" & "Hook B" for long version (6cm internally instead of 4cm), or if you need to clamp it to a thicker board/shelf, print “Long Clamp” ( 5cm instead of 2cm).
The author marked this model as their own original creation.