Simple under mount headphone bracket / holder

Just a super simple little bracket to hold headphones under a shelf or a desk, really any flat surface that you can screw to. Has 3 countersunk holes for small screws and has holes in the lower arm for a screwdriver to pass through. I printed on its side, which causes the holes to be ever so slightly ovular, but it doesn't seem to affect the usability. Printing on its side requires no support.