The pin breaks off too easily

The quality of the print and materials is beautiful, and these things look absolutely fantastic. The big problem is that if these get dropped even a foot or two (knocked off a table, etc) the pin immediately pops off and takes a chunk of the print with it. I thought the first couple breaks were a fluke, but every one I tried from even a short distance broke, and now I don't feel comfortable trying to sell these to anyone.