A TSA lock is a combination lock built directly into your luggage, approved by the Transportation Security Administration for use on checked baggage. Unlike standard padlocks, TSA locks have a design that allows authorized security personnel to open them with a universal master key. After inspection, security re-locks your bag to the exact same combination, so you never need to change your code. The lock is integrated into the bag's exterior, not a separate attachment, which means it can't be cut off or bypassed. For international travel luggage, a TSA lock means your bag is secured against casual theft, accessible to security screening, and protected throughout your journey. You set a personal combination, and only you and authorized TSA personnel can open it.