American Tourister Luggage Set 21" Carry On Rolling Luggage Add-a-Bag Strap - Allows you to carry two bags at once by securing another bag to the top carry handle of your luggage with a clip-on strap. Inline skate wheels - Are constructed of polyurethane with ball bearings to minimize frictional resistance, offer durability and reduced resistance for smooth rolling. Push button handle - Locks when fully extended so you can push or pull your case. The handle also locks when fully recessed, greatly reducing the risk of damage when not in use. Top carry handle - Allows you to lift the case with ease and comfort, or carry it by hand when rolling isn't an option.