These Latches are the First on Makerbot. There are two different Latches: One with a Hook, and One Without One... The bolt that can fit the hole has to be an 1/8" diameter. Now these pieces are not copies. They were made and designed by the L&N STEMPunks. If you have any trouble with the piece not working, place a comment and we will try to get in contact with you within a couple of days. Thank you and Go Gryphons!Prepare and Print!