I don't have anything so I'll follow Smithers lead and post about my keys. Car keys and mini-van keys, house key, bike lock key, key to lock my computer to the docking station, key to lock the docking station to my desk (work requires them both). Key rings held together with the Carabiner. Unlike the Pathfinder/Range Rover driving REI types that buy 'biners cuz they think they are cool, this one actually was used to climb and on more than one occasion saved my arse.