These are belt clips for a certain type of EDC pouch with multiple molle straps on the back.

One clip braces around two directly adjacent straps (2 in / 5 cm), the other hooks into that tiny loop at the top which comes pre-equipped with a carabiner hook and then wraps under the buttoned vertical straps.

Both aim to be usable for extremely frequent clipping and unclipping.

The newer "high" clip is horribly overengineered but works.

When printed balanced on one of the long edges, the filament strands of the shell run along the length of the clip and make it most stable. A few percents of overextrusion can help with layer adhesion throughout the model.

As much as everyone hates supports, they are mandatory here. One suggestion would be to add supports starting from 60 degree overhangs. This way, the 45 degree chamfers help keep the model separated from the support structure.