EXTENDABLE BASE PLATE+2 Elastic Ropes This utility cart features an expandable, thickened flat bottom plate extends from 17inch to 20inch to easily accommodate larger items, so say goodbye to worrying about oversized boxes. Non-slip texture ensures that goods will not slip out during transportation The platform size is 16.93*12.60*4.33ich , and the expansion size is 19.88*12.60*38.19ich HEAVY DYTY& DURABLE MATERIALThe luggage cart is made of 85% thickened steel material, which is more durable than the other plastic luggage cart on the market. The hand truck can Hold Up to 550 lbs capacity and it make the luggage cart move stably and smoothly in different kind of roads,and not easy to shake. (To ensure the stability, please place the goods in the middle of the truck base and mind your speed during using, also walk slowly when using it in rough road) ENLARGE WHEELS WITH BRAKES: 2 inch 360°wheels with brakes make the dolly better than are more convenient to use than most small