Enhanced Security: Puroma luggage lock offers a 4-digit combination that provides 10,000 unique possibilities, making it significantly more secure than normal 3-digit locks. The white numerals on the black dials make it easy to read your code, even in low light conditions. Durable Construction: Puroma travel lock is crafted from premium zinc alloy and long-lasting, sturdy steel, designed to withstand sawing, hammering, and prying attempts, providing maximum scratch protection for daily use and travel. Flexible Cable: With the flexible cable and portable size, our backpack lock is perfect for handling backpacks, zippers, equipment cases, gun cases and more, making it more versatile than ordinary shackles. TSA-Approved: Our TSA-Approved locks allow TSA agents to unlock your luggage with their key without causing any damage. Plus, the agent has to relock your luggage to remove their key, ensuring that your belongings stay safe during your travels. Wide Application: Its lightweight and unlock button design make this TSA lock for luggage convenient to carry and use. This storage lock is an ideal choice for protecting items when on business trips, traveling, hiking, fitness, etc.