This a very useful general propose holder - at least a cover around two nails which looks likely
It is made to put some note paper on the wall, hang up some important papers like tickets for coming concerts or just to use it as a twin hook fore something.
There is the possibility to put a pen on top and the rods have the size and distance of a standard puncher. So it's easy to punch a paper and then you can hang it up.
The Nails are incorporated into the two rods - easy to hammer them into the wall. The knobs can be fixed on the rods by turn them 90 deg.

Standard printing with 2mm
Use 2 pcs. 1.4x30 nails
The knobs can be (as in the pictures) made shiny with some acetone treatment