Description: DIY Assembled 6-dof Mechanics Servo Handle Robot Arm for Robotics Learning Kits Servo finish the grabing or lisfting action front and back, up and down, and left and right Can be used to test the servo motor coding for robotic engineers Suitable for learning the controling theory of automatic robotic arm; guest space and students learning kits Also learn serial ports controlling servo and potentiometer controlling servo Material: Plastic+Metal Size Chart: Base Size: Approx 9 x 8.4cm Package Includes: 1 Set Robot Mechanical Arm Kits (Servo not included)