This is a hammer loop designed to be carried in a variety of ways. The clip is designed to hook into a belt, slide onto pants, or hang on a nail in the wall. 

I printed with PLA+ and have had no troubles with this tool.

I designed this in Onshape. All of the models I done in Onshape have had issues scaling when sliced. If needed, just scale the model 2540% to switch from mm to inches.