Using a binder clip you can add these to the clip in order to hold objects better than just using the clip.
These are used to hold paper to a stencil or to glue items together where you need a tight clamp.

There are two sizes of clamps here. The 33mm is the width of the binder clip that I used while the 100mm adds more stability.

Updated: I have added a 20 degree clamp. When clamping thicker material only the corners of the clamp would be hitting the material.

I printed these in both TPU and PETG. I wanted the TPU 33mm around in the event that I needed to bind something and that it would give a bit more and not scratch the object. Whether the prevention of scratching is necessary is another thought. LOL