Available with rough grain (100/100) and intermediate grain (180/180). Straight side for shape and parallel filings, curved side for spiral filings.
How to use
Use it for reconstructed nails, its grain is specific for this type.
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 the file, as all nail accessories and make-up, is always a personal object. Use it only for yourself to avoid infections or nasty inconveniences.