The ring part. I have several small ones interconnected at the moment, but things keep getting tangled on it. And sometimes they get so tangled that they start to undo. I have now lost my PO Box key and only have the spare, and those ones are bloody expensive to get cut.
So any pointers on a keyring that can deal with 25 or so keys easily? Probably about 50-60mm diameter? Bunnings, mitre10 and a lock shop I went to were no help.