Plastic gear Motor BO1 series gives good torque and rpm at lower operating voltages, which is the biggest advantage of these motors. Small shafts give optimized design for your application or robot. Mounting holes on the body & lightweight makes it suitable for in-circuit placement. This motor is a perfect choice for lightweight Robots. The good news is that this motor is relatively cheap compared to other motors. So if you are looking for a pocket-friendly motor for some basic electronic projects, then this motor could be the right choice for you.