Summary

Nail holder
Do you want to hammer nails horizontally into the wall? This is particularly important if you need several nails at the same height.
My tool guides the nails and secures them with a magnet so that they can be hammered in easily. Beforehand, you can align the tool with a horizontal line already marked on the wall.
I printed the tool with my Prusa MK4S using PLA NX2 from Extrudr (no supports, no brim, 50% infill).
Magnet size: 20 x 10 x 2 mm