The fasteners are completely useless. They don't last even a month. The lenses are acceptable for their price.

I ordered three pairs of glasses.
a. One of them is very good and I still wear it.
b. I made a mistake with the second one and ordered the wrong degree of presbyopia.
c. When I opened the third one, it completely fell apart. The screws came off, one lens fell down and broke a little on the edge. In the end, they went in the recycling bin.

Extremely comfortable and clear at a very good price!
I am returning because they did not last long, unlike other zippos with the flexsystem mechanism on the arm that can withstand over a year!

Unacceptable glasses. The first 2 that I tried were defective, one in the lenses and the other in the frame. The 3rd one that I eventually bought broke inexplicably after 2-3 weeks at the hinge point