Erg79, yep. They're ideal for one bike, but not always two. Sometimes people aren't smart and don't face their bike opposite the other bike that's already parked so that the handlebars don't get in the way. The one I used today was situated next to a building so that I couldn't simply go to my side to unlock but rather had to carefully stick my hands through another person's bike to unlock mine I don't know why I didn't place my bike away from the wall instead. I remember someone posting here that someone had accidentally or intentionally locked his bike when he (assuming a male) was locking up his bike up. That has always been a fear of mine, coming out to see my bike locked by someone else's lock.