Here’s a smart idea to repurpose RJ-45 plugs and jacks. If you work in IT or have a collection of wires in your basement, you’ve probably seen the colorful RJ-45 plugs, typically used for ethernet connections. But as this Instructable shows us, it’s a simple matter of just cutting off the wires, looping the cable inside the rubber housing around a metal keychain and you’re done (basically). Of course you need the jacks to complete the wall-mount part of the key rack. I’m not sure how sturdy it will be as these cables are not usually plugged and unplugged so many times but I do like the color coordination and geeky reuse of possibly outdated cables.
Mediabridge Cat5e Ethernet Patch Cable (15 Feet) - RJ45 Computer Networking Cord - Blue - (Part# 31-399-15B )