These motors work best for fairy weights. I've seen others use them in ant weights. I've used them in a fairy and they had torque and power to spare. They held up really well, till I met a brushless out runner saw robot. I recommend getting the motor mounts.
These little motors do get the job done, but I'm a little disappointed in how mine have turned out. Don't drop them!! I had one with a broken brush tab, and I have one that spins great forwards, but really struggles with the other direction...