The Akro-Mils ProCart 400 Pound Capacity Heavy Duty 2 Tier Rolling Utility Dolly Cart with Wheels is a versatile, timesaving “double-duty” plastic tool cart. It's engineered to adapt to all the ways - and all the places - you work. Flip its side gates down and the ProCart is a flat-top cart - perfect for sliding heavy boxes on and off the shelves. Quickly flip its side gates up and the ProCart is a box-top cart for securely transporting cartons, supplies, or items that might roll around. It's easy to maneuver, even when fully loaded. Even under its 400-pound maximum payload, the ProCart easily maneuvers around tight corners and through narrow aisles with 5-inch non-marking wheels. Use the optional rail kits to hang AkroBin plastic storage bins or steel parts cabinets under the top shelf and the ProCart becomes a customized, mobile workbench for the workshop, garage or crafting room. It doesn't just look different. It is different! Made in the USA.