TSA APPROVED: 100% TSA Recognized and Accepted Lock allows TSA staff to inspect and relock your baggage without damaging the lock at 600+ airports around the world. You have 1,000 possible encryption combinations that provide greater securityEASY SETTING: Adopts a patented internal lock cylinder structure, 8-10 times more durable than regular locks, wont freeze or jam even after years of use. Setting up combinations is a breeze thanks to the large numerical dials and side read designDURABLE MATERIAL: The waterproof lock has copper lock cylinder with heavy duty ABS housing and hardened steel shackle, this makes our lock unbreakable, uncutable & resistant to all harsh weather conditions both outdoors and indoors. No key is required1,000 COMBINATIONS: The shackle is narrow adequate to thread through all standard sized zippers & lock holes to lock items indoor & outdoor like suitcases, hard cases, gun cases, briefcases, school gym lockers, sports lockers, fence, utility box, etcSECURITY DESIGN: The padlock resists abuse from luggage handling equipment and guards the zippers thus extending the life of your cases. THE SHACKLE CAN SUPPORT A WEIGHT OF UP TO 220LB, WOULD NOT BE DAMAGED BY MANPOWER.