My callouses could use a belt sander sometimes, especially ...
My callouses could use a belt sander sometimes, especially in summer when I go barefoot a lot.  This little gadget gets my feet from Fred Flintstone-like to soft and dainty in a short period of time as long as I use it, at least, weekly.  Initial charge takes a number of hours but after that it's ready to go in no time.  One charge has lasted me a couple weeks.
Rating: 5 stars