Excelent quality, durable, super light and flexible, good looking. Just as nice as a silhouetteframe that cost 10 times more. Recommended, just consider that this types of frames doesn't work on thick lenses. Is the snap type, not screwed. Unfortunately Did't work on my -6 glasses, but is not a product fault. Gifted to a brother and still going strong after more than 1 year of use an abuse.