this cubicle hook won't work in areas where there is already something hanging (it takes up the whole width for better strength and stability). 

If you want the mirrored version you can mirror it in your slicer. 

Printed in PLA. I haven't done strength testing but probably easily holds 20 lbs or so, plenty for jackets and backpacks. 5 walls top and bottom, gyroid infill at 25%. Shouldn't need supports for most printers no angles <45 deg