This is a small driver to help deal with the passthrough locking bolt (https://thangs.com/designer/Multiboard/3d-model/Passthrough%20-%20Locking%20Bolt-1310057?srsltid=AfmBOopyPEa-lZg6bRYGOprFQVsn4Z96iNUEpb4oipzqrv2KQl0pjNy1). It's rounded over for easy grip and so far has been working well. I printed it in PETG with 5 walls and it is holding up well to repeated use so far.