what to do with isolation xformers?

hello all!

in my never ending search for parts and pieces and surplus stuff, i picked up 5 1.2kva isolation transformers. they are pretty beefy and well made. they have mounting brackets and all.

is there any use for these? what would one use these for? if anyone needs one, they are for sale. i actually picked them up with a lot of other surplus stuff, so i just didnt want to pass them up. at the time i didnt know they were isolation xformers.

so, any ideas of what to do with them?