3-dial combination convenience, sturdy metal construction and side window for easy viewing. Nickel finish. Transportation Security Approved lock designed with a security feature, which allows airport security agents to open the lock. Travel Sentry-logo onlock indicates to TSA screeners that they can use a secure set of codes and tools to unlock, inspect and relock traveler's baggage without damaging the lock. TSA guarantees replacement of the lock if screeners cut the lock. 1-1/4 in wide case, 1/8 in diameter shackle, and 1/2 in horizontal shackle clearance.