What you actually need for stability and balance, included is 2 Swivel and 2 Swivel with Brake Rigid plate casters
Polyurethane protective wheels that wears like steel, lt br gt chemically bonded onto heavy duty Steel wheel centers, lt br gt non sparking, non conductive, impervious to oil, ozone, grease and most solvents, and will not mark floors
Ready for your loads with the Capacity 300LB per wheel Total 1,200LB
Sleek modern industrial design with Red and satin finish steel, lt br gt perfect for work or design elements
Ball bearing Rollers which offer maximum rolling ease and requires less effort to start rolling and keep rolling