This is a clip that will affix an IKEA Vattensten LED Light Strip to a Whalen Industrial Rack. My experience with the Vattensten LED light strip is that the adhesive on the back side is basically worthless. Couple that worthless adhesive with a powder-coated steel rack, and you have yourself an LED strip that falls down within a few minutes.
So I did a few measurements and then designed and printed these clips.
The author marked this model as their own original creation.