Sturdy structural foam construction won�t rust, dent, chip or peel. Rounded corners protect walls and furniture. Lightweight and maneuverable. Large 5" (12.7 cm) non-marking swivel casters. Sturdy, structural foam construction won�t rust, dent, chip or peel. Large, non-marking casters. Ergonomically designed push handle provides optimum hand placement and push height improving control and worker safety. Molded-in storage compartments, holsters, hooks, and notches. Molded-in customizable fittings. High density structural resin construction. Easy-access bottom shelf . Best-in-class casters to meet the most demanding environments.