Fortified Security: Puroma 4-digit luggage lock provides maximum security with 10,000 possible combinations, making it ten times longer to decode than 3-digit locks. Give you peace of mind while working or traveling. Robust Build: The travel lock for backpack is made of premium zinc alloy and sturdy steel, providing long-lasting reliability for daily or travel use and is resistant to prying, hammering, and sawing for higher security. This durable TSA lock is also not easy to rust and corrosion. Great for outdoor and indoor use. Convenient Design: Puroma TSA locks for luggage come with an easy-to-read side window design that makes it easy to set the combination. Its simplicity and efficiency save you time when using it for suitcases, backpacks, gym lockers, and other lockable items. TSA-Approved Locks: Our TSA lock allows security authorities to unlock and inspect your luggage without damage with their Keys. Upon inspection, they must relock your luggage, ensuring that your belongings are safeguarded during your travel. Versatile Application: The lightweight and pocket-sized construction make this keyless code lock the perfect choice for protecting any of your personal items during business trips, travel, hiking, fitness, and more.