I found them very thick and very curved, I was afraid that they do not stick.
I tried to stick them, as I did with other capsules, I pressed for about ten seconds, but releasing, the capsule is detached, I immediately re-pressed for twenty seconds additional, and there, the capsule has fully adhered to the nail !!
this is the downside of this product, it takes longer to maintain during bonding.
Otherwise for filing no problem despite the thickness.
It's been two weeks since I these capsules, they hold very well,
even a little too much because tinkering I had a shock the nail, I thought he was going to tear the finger with the capsule, I screamed in pain, but remained intact , !! lol