I bought the Pacsafe ProSafe 700 Combination Padlock just before a recent trip to Portland, OR. I hadn't flown in a while, and I didn't have any TSA-approved locks . I had heard about how durable and secure PacSafe products are so I thought I'd give this lock a try. Right out of the package, my first impression of it was that it looked pretty damn tough! Setting the combination was super easy too, and you can change the combo as often as you want to. Before getting this lock, I've always used Master locks for everything and never had any problems w/ Master. But after this round-trip flight to Portland, I know know that Pacsafe locks are just as durable and secure as those big, burly Master locks. I recommend the Pacsafe ProSafe 700 Combination Padlock to anyone who needs a TSA-approved lock for their luggage, or for locking anything else!