SainSmart 6-Axis Desktop Robotic Arm & Grippers, Assembled for Arduino UNO MEGA2560 Production Quality: Structure consists of different thickness of CNC machined PVC plates, making it a durable and quality product guaranteed. The main joints utilize metal gear servos (MG966R and SG90), ensuring a reliable and smooth operation. Motion Flexibility: Quality servos, precision structure, and 6 axis design allow an immense range of motion and flexibility within its reasonable limits. Programmable: Servos are completely programmable using any microcontroller and code. We provide a lot of source code on our wiki webpage( SainSmart Wiki )for the Arduino Mega, making this unit suitable for beginners! Simple Setup: All the parts are fully assembled, allowing for immediate programming and use. Stem Education: Simulate this real palletizing robot arm and learn about the basic construction of a real robot arm. A fun STEM educational experience in mechanical engineering and electronics.