Krowne Metal 28-135S Heavy Duty Adjustable Height Plate Casters are designed for robust performance and versatility. Each caster supports a load capacity of 500 lbs, making them ideal for heavy-duty applications. The height adjustment feature allows for a range of 6" to 7", providing flexibility for various setups. These casters swivel for easy maneuverability and include a locking mechanism for stability when needed. With a 3" diameter wheel and a plate size of 3-1/2" x 3-1/2", they are grease resistant, ensuring durability and ease of maintenance. This set includes four casters, perfect for enhancing mobility in your workspace.