Our feet have double cuticle: outside crust and inside white pellicle.
Shere&Nagel cuticle file effectively delivers from outside crust and Cuticle pencil peels inside pellicle and nourish nail plate.
Having not varnished nails you can put pencil's oils to the whole nail - to make it stronger and less fragile.
Can be used for pedicure.
After bath or shower peels steamed out nails skin with a bit more pressing against the cuticle growth. Doing it regularly the cuticle will not grow and you will not have to cut it off.