【Industrial-Grade Durability & Silent Rolling】 6-inch heavy-duty rubber caster wheels paired with reinforced iron brackets, engineered for long-lasting performance in rigorous workshop, warehouse and factory environments. Features ultra-smooth, noise-reducing rolling—no loud squeaks to disrupt workflows—with a practical configuration of 2 fixed casters + 2 brake-equipped swivel casters for heavy-load handling. 【Effortless Movement & Industrial-Specific Versatility】 Save significant energy when moving bulky, heavy items—maneuver industrial machinery, cargo and equipment with ease without straining. Ideal for warehouse trolleys, logistics dollies, mobile workstations, exhibition display stands and heavy-duty industrial carts, perfectly adapting to high-demand work scenarios. 【Precise Dimensions & Superior Load Capacity】 Wheel specification: 6" (diameter) × 2" (thickness); overall height: 7"; top plate size: 3.75" × 2.6". Each wheel independently supports 250KG/551LBS, delivering a total load capacity of 1000KG/2205LBS for the 4-pack set, ensuring stable operation under heavy weights. 【360° Swivel & Stable Anti-Scratch Design】 Equipped with 360° rotating top plates for flexible direction adjustment while maintaining maximum stability during transportation. The non-marking black rubber surface protects concrete, asphalt and workshop floors from scratches, with core advantages of flexible movement, stable lifting and easy operation. 【All-In-One Package for Hassle-Free Installation】 What you get: 4 heavy-duty rubber casters (2 fixed + 2 lockable brake swivels), plus a full set of matching bolts and nuts included in the package. No extra accessories required—install directly on equipment in minutes and start using immediately. Heavy Duty Casters Set of 4 for Cart, Trolleys, Furniture and Workbench(2PCS Fixed Caster Wheels 2PCS Locking Swivel Casters)