They work great to make smooth idler wheels for astromech units, and anything that needs a caster...
They work great to make smooth idler wheels for astromech units, and anything that needs a caster-- this is BETTER! Smooth for things 10lb and under, if you need to be under things 20 or so pounds and under, they can be sandwiched together with a washer. very good quality! Anything higher than 25 or more pounds I would say use the aluminum frame omniwheels. These are excellent quality.