Arduino small motor gears question


Can anyone tell the small yellow motors from the smart car kit use worm gears or not? The 90 degrees shaft suggest they do, but I need to be sure.

I’m interested since there will be needed an actuator with high holding torque when motor is not powered

See the attached picture of them.

They are easy to open up and look into. I have some. I did. I have forgotten. I don't think they have worms.