In the event of catastrophic damage, black acetate is not difficult to repair. If the spring hinge is broken, you need to be a little more careful. My eBay deal broke strathmore and bernardo. Bernardo had a broken hinge and transplanted it from another Bernardo. I'm learning how to make glasses, so it's helping me improve my skills.I'm your friendInteresting development with my Dior Black Tie frames... I just received a message from the eBay seller. They have shipped the frames to me but issued a full refund. They said the glasses were not in as good of condition as they had thought and did not feel comfortable charging me. So either I got a screaming deal or am about to receive garbage LOL... I'll keep you posted.