Caster wheels are small, wheeled devices that are attached to the bottom of furniture or equipment to allow for easy movement. They come in various sizes and materials, making them suitable for different surfaces and weight capacities. Commonly found on items like office chairs, carts, and hospital beds, caster wheels can swivel or remain fixed, depending on the design. These wheels are typically mounted on a bracket that can rotate, enabling smooth navigation in tight spaces. Caster wheels can be categorized into two main types: swivel casters, which can turn in any direction, and rigid casters, which move in a straight line.