The Snap-Loc Dolly System is the easiest, fastest and safest way to move more in less time! THE PROBLEM: Cheap dollies have junky casters that don't roll well, break often causing valuable items to dangerously fall and waste your time and money. THE SOLUTION: The Snap-Loc Dolly has high capacity smooth rolling casters, is USA made to last a lifetime, offers E-Track Strap cargo anchoring with Push-Panel Bars that transform to move everything with ease! You're going to love it! Dolly System also coordinates with the Snap-Loc E-Track Single System to secure cargo and items on pickups, trucks, trailers, racks, walls, floors, ceilings and more! (Customer SEO keywords for discovery search: 4 wheel dolly, dolly cart, push cart, panel cart, platform cart, heavy duty dolly, wood dolly, plastic dolly, heavy duty platform truck, lumber cart, storage cart, storage dolly, storage solution, storage, caster wheels, swivel non-marking casters, rolling heavy clutter, smooth movement, plastic, textured grip pad deck, flat top, open deck, hand bar, handle bar, hand truck, tie-down, e-track tie-down, e-track logistic strap, e-track single, e-track dolly, mover, moving, furniture, appliance, cargo mover, steel frame, safe, safety, convenient, sturdy, professional, versatile.). Material: Polypropylene.