These combs are made of really good plastic. I was impressed with the initial quality.Then I tried to put them on, they use a 'spring' type attachment to keep them on. I noticed that the 'spring' part gets stuck often and I have to 'force' it back after use (only on some of the combs)I'm not sure how long they will last, the 'spring' is very cheap, but does the job. They are the nicest combs I've seen other than the 'spring' issue.