This Servo Saver, acts as the servo arm, and prevents stripped gears in the servo. In a high torque situation... say you were flying low and trying for a right hand turn, but you hit some thing hard with your left wheel! You have a servo turning right and very suddenly it can't.. the torque is high.. and normally gears would be stripped, but instead... the Servo Saver slips, and then pops back into place and all is well. Servo, saved... maybe not the steering knuckles.. but the servo will make it! This part is held on by one screw.