QWORK Storage Rack Caster Wheels 4 Pack 3″ Heavy Duty 500 lb. Max Total Capacity Storage Shelf Accessories Fit for Boltless Self Locking Shelving

“Safety Wheels: These wheels are suitable for storage racks with a bolt-free self-locking shelving system for easy movement and secure display. Heavy Duty Bearings: 500 lbs maximum total capacity locking wheel with ball bearing durable steel construction high strength corrosion-resistant.”

• Safety Wheels: These wheels are suitable for storage racks with a bolt-free self-locking shelving system for easy movement and secure display.
• Heavy Duty Bearings: 500 lbs maximum total capacity locking wheel with ball bearing durable steel construction high strength corrosion-resistant.