Weeemake metal robot gripper is made of anodized aluminum and servo motor. A robot gripper is a type of robot end effector, which is a device that is attached to the end of a robot's arm and is used to interact with the environment. It is typically designed to grip and manipulate objects. The gripper is made of aluminum, which is a strong and lightweight metal that is commonly used in robotics due to its durability and resistance to corrosion. The gripper works by using a series of internal mechanical components, such as motors, gears, and levers, to open and close its fingers in order to grip and release objects.