Additional Features - Solid construction of high quality zinc alloy and plated steel. - Discourage the thief With the tough 4-digit locks with 10,000 of possiblities which cannot be cracked . Our TSA approved luggage locks are designed and tested to withstand the rigors of travel Not Only Limited To Travel The TSA Locks can also be used for anything that a padlock could be used for, such as: Smaller lockers & cabinets, cases & bags, chains, hasps and more.