Flexible Robotic Arm: Gripper opens to 3.54 inches and 260 degrees radial wrist motion of 180 Degree an extensive elbow range of motion of 180 Degree base rotation of 180 Degree. 4 Axis design makes the robotic arm move flexibly that can grab objects in any direction. Convenient Control and Gripper: It's convenient for you to control the arm robot toys in 2 ways - handle and computer. Grippers have double layers with pointed end and jagged edges which will grab the object firmly. Manufacturered by SunFounder. 101 Pieces Included: Robotic arm kit with R3 4 servo motors the MAX torque of the clutch gear digitalupgrade durable and shatterproof plateExpansion board4 Potentiometer buttons and so on. Easy to Build: Our Arm robot kit packages with 101 pieces and a detail PDF instruction which is easy for teen to build them together. Robot kit for Arduino: The interactive learning robot kit for teens to learn visual coding building and programming.