TSA Approved Security: Designed with a recognized TSA key cylinder allowing airport security and customs authorities to inspect your baggage using an official master key without damaging your lock or luggage zipper. Inspection Indicator Alert: Built-in Travel Sentry red indicator turns from green to red if customs officers open your lock, instantly notifying you upon baggage pickup that your bag was inspected. 4-Digit Resettable Combination: Offers 10,000 unique combination possibilities for enhanced security compared to standard 3-digit locks, featuring a quick and simple code set-up mechanism. Durable Steel Shackle & ABS Body: Constructed with a high-strength steel shackle designed to fit most luggage, handbag, and backpack zippers, paired with a lightweight, rust-resistant premium ABS lock body. Versatile Travel Protection: Ideal for securing suitcases, carry-ons, duffel bags, backpacks, travel pouches, and storage lockers.