Newtion TSA Approved Luggage Locks With Open Alert Travel Security 3 Digit Combination Password Locks for Suitcases TSA-Approved Locks:It made of special zinc alloy,hardened steel shackles and patented internal mechanisms,these are the toughest locks to protect your valuables.If you aren't completely satisfied,just tell us,We offers full refund guarantee on our luggage locks. Lifetime Warranty: Each digital backpacking lock comes with a 100%, no questions asked replacement money back guarantee. Instructions come with every luggage padlock purchase. Easy To Use: 4-digit combination,the factory combination of the lock is 0000,you can setting and changing the combination whatever you want.there are detailed instructions in the product description and pictures. Many Uses:The TSA locks can be used on a wide variety of items besides suitcases or luggage.These combination locks can be used on briefcase,backpack,gym locker,laptop bag,pelican case&more. Great for commuting,train rides,bus trips & travel abroad.So you do not have to with keys any more. Pay Attention:There is no key provided for all TSA Approved combination locks.The key slot is designed for security officers to use to access the luggage for inspection.Please remember your password.