The mBot - Robot Gripper is a simple and durable robotics kit that is great for "getting a grip" on pretty much any robotics project. Features Self-Protection DesignThanks to the built-in fuse, the inner N20 screw motor of the gripper will automatically stop running when the gripper is fully open or closed. This protects the screw motor from short-circuits and over-current, ensuring long-time use of the gripper.Self-locking & Anti-SlipperyThe self-locking function of fingers, together with the anti-slippery material added on the inner side of two fingers, protect objects it grips from falling off.Lightweight PVC MaterialThe gripper itself is made of light-weight PVC material, while remaining heavy-duty to grip items up to 1.5KG as you want.Large Open-WidthThe Robot Gripper is capable of opening an impressive 3" (67mm) wide. It enables you to grip items of various sizes according to your needs. Note: This gripper is only compatible with the mBot Ultimate.