Nail strengthener for cracked/breakable nails

Widshan Miracle Protector

Is this a strengthener? A supplement? for nails that break easily.

It is said that nylon yarn forms a dense film on the surface of the nails.

They say that applying it in a grid pattern makes it stronger.

However, if I apply nail polish after using this product, it doesn't feel very smooth. It seems like there are thread-like strands on my nails due to the nylon yarn.

My priority is keeping my nails strong and fixing the crack, so I'll apply nail polish after a few days.

It's Made in Korea.

I took a shot of it on my nails, but the bottom photo came out better.

Those thread-like things stuck together that look like tiny scratches on fingernails are nylon yarn..