This is a small servo motor with hard plastic gear. This small and lightweight servo comes with high output power. Thus, it is ideal for RC Airplane, Quadcopter, or Robotic Arms, etc. It is a digital servo motor that receives and processes PWM signals faster and better. This motor equips with sophisticated internal circuitry. This feature provides good torque, holding power, and faster updates. They are packed within a tight sturdy plastic case which makes them water and dust-resistant. So if your application requires stronger and long-running motors you can go with our new and improve S3003 servo motor.