I use a quick disconnect for my keys too. Car on one, house misc on the other. I use pretty much 2 keys other than my car 99% of the time, but have 3 or 4 back keys for my ex-wifes house and my parents house.
Funny thing, I bought one when I was 19 and it served me well for over 20 years before it broke. Got a replacement that appears to be aluminum instead of nickle plated brass. Not nearly as nice 
