Screw-in Casters, Threaded Casters, Swivel with Stopper, 50mm Swivel, M8 8mm A-Type Screw-in, Wagon, Shopping Cart, Furniture, Replacement Tire Kit, DIY, Twin Wheel, Hard Rubber Casters, 50mm Diameter, Set of 4 Installation Type: M8x15mm Threaded Stem; Package Contents: 4 x Screw-in Casters (50mm diameter), 1 x Simple Wrench. *Since the screw size is metric M8 standard thread (maximum diameter of the screw is 8 mm), please check the screw size before purchasing. If you are unable to install them, please do not hesitate to contact the seller. We will provide a full refund. Material: Iron (zinc-plated), Nylon, each wheel can bear a weight of 45 kg. For repairing wheels of shopping carts, suitcases, carry boxes, etc., and for replacing casters. Easily replace worn casters yourself! Be sure to check the size of the casters before purchasing. Made of high-quality solid rubber. Provides smooth rotation and full swivel action while protecting the floor. #Welcome to Chimitaku's Shop 23-275821