【Quality Material】The casters with brake are made of high-quality polyurethane, with silent double bearings and high-hardness screws. 360-degree rotation: The furniture casters with brake can rotate 360 degrees freely, which can easily move furniture and quickly steer, making furniture more flexible and easier to transport. It is a good choice for people with little strength. With brakes: Each set of furniture casters is equipped with two reliable brakes that can firmly lock the furniture in place, ensuring stability and safety and giving you a better using experience. Easy to install: Just rotate the holes and pull the screw, no need for screws and screwdrivers to easily install it on the furniture, eliminating the need for complicated installation steps, simple and convenient. Swivel Casters with Brake - Thread Diameter: 8mm - Thread Length: 25mm - Wheel Diameter: 40mm. Versatility: These casters are suitable for all kinds of heavy furniture, such as sofas, beds, wardrobes, etc.