I got home and opened the package. So far, they seem extremely well-made. very high quality finish, with the light traps attached via screws, so if they do go bad, they can be serviced. That's a big plus right there. They don't seem to be substantially heavier than my plastic holders. The tape on the hinge is some kind of vinyl tape, which I'm not sure how well it will hold up to use, but that's not a big deal as I have bookbinder's tape that I've used to repair other old wood holders. I'll test them out this weekend for film fit.