Someone should probably insert the obligatory XKCD "Emacs keystroke as space-heater" link, but I'm too lazy to go look for it. [Edit: Oh look, someone did. Of course!]

(BTW, whaddayamean "the official name is not 'Renklämma'"? I never heard them called anything else. If the alternative is "Polarklämma", there's nothing "official" about that AFAICS; it's just one manufacturer's product name.)