Screw into anything that has a push-fit hole, like into a bolt or the back of a snap to make it look nicer.
It has no holes, so you can’t insert anything into it.
The printing orientation is as provided in the file. The print has been designed to be “3 wall perimeters” in wall thickness. Printed at a layout height of 0.2 mm. It doesn't need printing supports. Use the default 15% infill. This part has been designed with a tolerance of 0.25 mm. Your printer will need to be able to bridge gaps of up to 30 mm for some designs.
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This object is part of Multiboard, a FREE "all in one" organization system with 700+ parts, that combines pegboard holes, honeycomb snaps, Gridfinity like bins, threads, brakes, and much more.