Introduction
The turbo metal gear worm motor uses a metal gear box for durability and a high torque output. Due to the special mechanical structure of the worm drive the motor output shaft is self locking and can not be rotated.
(From wikipedia)
This part uses a two wire connection and supports direction control as well as PWM speed control. Rated voltage is 6v and will achieve 40RPM, with a torque of 10kg/cm.
Warning: Do not stall motor for extended periods of time to avoid damage to the gearbox.