The telescopic portable trolley system has 2 stages /3 stages/ 4 stages/ 5 stages extension aluminum tubes, which can be outside mounted on luggage and suitcases. Along with a comfort grip, durable frame, foot stand, spinner wheels and side wheels, it is great for fabric luggage, aluminum cases, ABS & PC cases. TRAVELJOY is the leading Luggage cart manufacturer in Taiwan to make collapsible cart and folding trolley.