Holder for needle files.  Needle files are a great accessory for 3D printing; they are useful for cleaning edges, smoothing faces, and removing support material.

It can be mounted with Command Strips or the holes provided for screws.  The screw holes are intended for a flat head No. 6 or M3.5 wood screw.

The needle files at the link below are known to work.  Other brands in this category should work as well.

https://www.amazon.com/gp/product/B00X5I5YS2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1