Need some seriously sturdy casters that can handle heavy stuff without making a racket? These 5-inch swivel plate casters are built to move up to 550 pounds EACH - that's 2200 pounds total for a set of four! The wheels are made from polyurethane foam that rolls quietly and won't mark up your floors, which is perfect if you're using them indoors. They've got this smart dual locking system that lets you lock both the wheel from rolling AND the swivel from turning, so whatever you're moving stays exactly where you want it. The 360-degree rotation means you can maneuver things at any angle without struggling. Installation is straightforward with the included screws, and the top plate measures 3.74x2.6 inches with standard mounting holes. These workhorses are great for industrial equipment, medical carts, furniture, gym equipment, moving dollies, or even heavy storage containers. The steel construction ensures they'll last through years of use, and they come with a 2-year warranty for peace of mind. No more straining to move heavy workbenches or equipment - just wheel them around effortlessly. The polyurethane material resists wear, chemicals, and temperature changes, making them suitable for various environments from workshops to healthcare facilities.