Very good buy and work well.
This was my first experience with glass holders and was pleasantly surprised.  The box contained three (3) different colored holders and was very inexpensive!  I was also pleased with the clasp which allows them to be shortened so the eyeglasses do not flop around so much when bending over.  I have only been using them for a week or so but have no complaints and would definitely recommend them.
Rating: 4 stars