Another creative mounting solution can be achieved with self-adhesive stainless steel discs
or self-adhesive metal discs in grey or white (linked below) and cube magnets, such as W-05-N
The stainless steel discs function as the magnetic base on the bottom of the shelf.
After the drying period, you can attach the cube magnets.
Then, you can hang up nail clippers, tweezers, and even smaller pocket knives.