OULII TSA Approved Locks Security Luggage Locks Combination Padlocks 4-Pack 3-Digit Black Material: durable zinc alloy. TSA Approved Lock: Allows TSA screeners to inspect and relock baggage without damaging the lock, for added security. Easy to use, this 3-Digit combination lock protects your luggage with a personal coded lock. Can be used for locking luggage, suitcase, tool box, locker golf bag, bags, backpack, drawer, etc. The lock password can be resettable according to your own needs.