3V DC Double Shaft Mini Motor has a shaft on both sides. This particular motor is a standard “130†size DC motor – but instead of a shaft extending from one side, this motor has a 2mm shaft extending from both ends.After power-on, both sides rotate at the same time, which can make a variety of interesting science works. This motor is copper wire winding, good quality.Features: High Quality, copper wire winding. Shaft Diameter: 2mm Applications: Small Toys, DIY Projects.