Our TSA Security Window Locks feature a design revolutionary in the industry. Like any TSA approved lock, it can be opened by TSA agents. The difference between this lock and others however is this. The lock has a security window that changes from green to red when a TSA agent opens it. In other words, you know when your lock has been opened and if your bags have been searched by a TSA agent. This lock will make anyone think twice about mishandling your case.