Clip for vertical strap, such as a pinpointer holster.

thingiverse

My son bought a pinpointer, that is a small metal detector that you can use while digging and searching for metal objects. It came with a nice holster that you can use with a belt. My son does not wear belts, so I printed this clip instead. He can use it to clip the holster to his jeans. I will add pictures later.