If you have lots of keys you need to keep organised and in a safe place this fantastically unique geeky RJ-45
Ethernet keychain rack could be the perfect solution. Especially if you
have a few unwanted old RJ-45 Ethernet sockets just sitting around,
Its been created by Instructables user harari and shows how a few
Ethernet ports can be put to good use, together with some coloured
Ethernet cable to help identify the keys even easier.
Simply attached the Ethernet ports to
the wall and then add keychain rings to RJ-45 cable connections to
create the key hangers. Full instruction on making your very own can be
found over on the Instructables website.