These 4-inch caster wheels are designed for commercial kitchen prep and work tables, and other tables with 1-1/2" diameter opening. The wheels offer exceptional durability and resistance to wear and tear. They can withstand the constant movement and heavy loads typical in commercial kitchens. The 4-inch diameter offers a balance between maneuverability and load-bearing capacity, each wheel can support up to 300 pounds, making them ideal for various kitchen setups.