This seemed like as good solution for light security. Set combo and used it for a month or so successfully, until ... out during errands, locked and unlocked a few times in the morning, last stop the lock wouldn't open. Tried rolling cylinders, tried nearby number combinations, nothing. Fortunately, I was at a motorcycle shop. They played with it a bit, but finally I asked them to cut it. A pair of short-handled bolt cutters snipped it easily (it's aluminum, I think). I suppose they'd send a replacement, but what's the point? I'd never trust it again. I can't take a chance on being in some remote place with my helmet unusable (and there's helmet law in California). I wasn't thrilled with it anyway. Tough it get it around bars or rack and then reach a d-ring, it's just a little too small. I've back to a more sustantial steel cable lock with key.