Rubbermaid heavy-duty two-shelf black plastic utility carts with a lipped shelf have several built-in features that make transporting items more efficient. Large, 5-inch swivel casters don't mark up floors while making turns easier to make. Rounded edges on the corners prevent damage to walls, furniture and equipment. Ergonomic handles offer improved worker safety and better control due to optimum hand placement during transport. Two shelves let you organize items based on your needs and priorities.