Scrapping a Logitech Z340 subwoofer

Hi new scrapper here trying to scrap my first object, Im currently trying to scrap a Logitech z340 sub woofer and was wondering what kind of wrench i need to remove this nut from the circuit board? I am also wondering which parts I should take from this particular circuit board that are worth my time? I would post pictures to make myself more clear but I am not allowed yet to post links. Is there any other way I can post these pictures for help without a link? thanks in advance

Follow the linqs below my signature line. All your answers are there.