I got this cable lock to use on the outside pocket of a carryon.  The pocket wasn't intended to be locked, but I can feed the cable through the zipper pulls and make it secure.
October update. At first I was delighted, but then one day the combination had been reset - not by me.  It was only off by one digit, so I kept on using it.
On a recent trip, I could not get the lock open, so I had a maintenance man cut it off.  I don't know if it reset again or if it jammed.
The cable was pulled pretty snug, so maybe that caused the probem.
I'm sorry it didn't work, because I sure liked the idea.