A Stepper Motor is a type of electric motor used in applications that require precise control and positioning of the motor. The Pololu BIPOLAR 35×36MM 2.7V is a high-torque, four-phase stepper motor specifically designed with an angular step size of 0.14° per step and an operating voltage of 2.7V. This stepper motor is ideal for applications that require high precision positioning control with a low holding torque due to its small size (35×36mm) which allows for applications that have restricted space. The stepper motor is capable of producing moderate torque at low speeds (up to 12rpm) and supports microstepping for finer motor position control. Additionally, the motor features 2 keyed flat shafts that allow for the secure attachment of your own custom components or wheels to your motor. The Pololu BIPOLAR 35×36MM 2.7V stepper motor is a great choice for small, precise projects that require a reliable and accurate control system.