I bought this bag (from k-mart) primarily because it was small enough to mount on my handlebar and not obscure my handlebar mounted headlight, but large enough to carry my relatively small u-lock and also my cable lock. I've had mine for about 8 months now and it's falling apart. I've always had problems with the zippers, they had a tendency to split open when I had both locks in the bag. Not an over-sized load, but u-locks are kind of heavy. So I just left the zipper zipped up to the middle of the bag. Just recently, the zippers have begun to detach from the bag at the seems. At $15, not including shipping, there are plenty of other bags available on Amazon, surely one of them offers better construction quality than this one.