Use it for filing and modeling reconstructed nails with Laylacrygel
Pro and cons
PROS in addition to being a very high quality file it has the advantage of having a universal shape, that is suitable for any type of filing and, most importantly, it has the same type of grain on both sides so you can use it in the direction you prefer.
Remember that like all nail and makeup accessories, the file is a personal object. Use it only for yourself to avoid infections or nasty inconveniences.