It is easy to open - and close - a travel bag or suitcase zipper closed by without you noticing. These locks are there to prevent this from happening but they also benefit from a TSA lock security forces that airports will use to open your luggage without completely screw up. And it is even a requirement when traveling to the USA!
Relatively easy to adjust, four combinations for added security, these locks are perfectly the job. And they seem strong enough to take the shock over time.
