Padlock is best used for travel on backpacks, bags, briefcases and luggage TSA approved luggage lock allows Transportation Security Administration screeners to inspect and relock baggage without damaging lock Convenient key lock set is ideal for those with multi-luggage travel; same key opens all four locks Padlock is constructed from a solid metal body for durability and steel shackle for cut resistance 7/8 in wide Lock body, 3/32 in shackle diameter, 7/16 in shackle height, 9/16 in shackle width includes four locks, two keys