A grab bucket, a specialized tool for a crane to handle dry bulk cargo. It consists of two or more movable jaw plates that can be opened and closed to form a container space. During loading, the jaws close onto the material pile, capturing the material within the container space. During unloading, the jaws open while suspended over the pile, allowing the material to fall onto the pile. The opening and closing of the jaws are typically controlled by the crane's lifting mechanism via钢丝绳. Grab bucket operations eliminate heavy physical labor, achieve high loading and unloading efficiency, and ensure safety, making it a primary tool for bulk cargo handling at ports.