Smooth 360°Dual Wheels Spinner --- The sturdy four dual wheel spinners allow you to maneuver the suitcase easily and smoothly, on different surfaces even around corners. Quality Constructed --- The carry on luggage is constructed from high quality ABS material with aluminum pull rod, ensuring your clothing, toiletries and other essentials have a durable and comfortable spot even over thousands of miles on the road. Secure Combination Lock --- TSA-approved locks for 28" and 24" luggage and secure combination locks for 20'' and 16'' suitcase ,equipped with the TSA approved lock, this luggage set offers a safe and secure area for your personal valuables. Super Lightweight Design --- No matter you are a frequent traveler or occasional traveler, this luggage set is your optimal choice to make any types of trip more pleasant. The luggage set promises impressive durability, boasting a sturdy ABS shell, a top-quality polyester lining interior, and a robust aluminium pull handle. For maximum protection, corner guard protectors safeguard against damage and a TSA-approved combination lock is for added security. Each carry-on luggage bag's multi-directional wheels and retractable trolley system allow for quick and easy manoeuvrability. In addition, it contains a 16-inch luggage trolley, a 20inch carry-on, a 24inch medium spinner, and an expandable 28inch suitcase for various travel plans. When not in use, store the 3PCS in the 28-inch luggage for space maximisation and optimal hygiene.