Gear Motor - TOOGOO(R) DC 6V 100RPM Mini Metal Gear Motor with Gearwheel 3mm Shaft Diameter Model:N20 This is a DC Mini Metal Gear Motor,ideal for making robots Light weight, high torque and low RPM. Fine craftsmanship,durable,not easy to wear. With excellent stall characteristics,can climb hills easily. You can also easily mount a wheel on the motors output shaft.