Sometimes it's the simplest things that are best. Like a bacon sandwich on a crisp morning or tricking a dinosaur into thinking another meteor is coming so you can bed it that night. And then there's this keyring. Which is both key AND keyring. What will they think of next?!?
Carry your keys on your other key. Real working key blank. Key blank can be cut by any key cutter to fit KW1 or SC1 keyways.
You can get a 2-pack for $7, which, according to my calculations, makes a 4-pack about $18. What? I NEVER LEARNED THE MATHS, OKAY? But you know what -- YOU DON'T NEED ALGEOMETRY TO KNOW HOW TO BLOG! Or any skills really. Just a drinking problem.
Split Ring Key [amronexperimental]
Thanks to Scott, who actually invented the thing. Nice, now how about a door that is both door AND knob. Oh I'm sorry, did I just blow everybody's minds?