One of our best kits, The Robotic Arm Edge teaches basic mechanics and control of robotic arms.Using five motors with gearboxes, the Edge has five degrees of freedom: a 120 degree wrist motion, a 300 degree elbow motion, a 180 degree shoulder motion, a 270 degree base motion, and a 0-1.77"" (0-4.5cm) gripping motion. Illuminating whatever the gripper is holding, a white LED is mounted to the 'hand' of the arm. An illustrated manual guides you through assembly, which requires only a Phillips screwdriver, long-nose pliers and diagonal cutters, no soldering is required. Be sure to see our optional USB control kit--it allows you to use your computer to program and automate the arm!