You can get a nut cracker... no but really its a special socket that will sort of cut into the nut on the rim, and then you can unscrew the nut. (thats how people steal rims these days..) Also remember to have a new set ready, because doing this will ruin your old nuts. The only way to not ruin them, is to get the correct key. Some larger rims shops usually will have a few spare keys laying around, maybe you will get lucky and they will have a match. Most likely they wont, but once i forgot my key socket, and they had one really close that barely worked. GOOD LUCK WITH YOUR NUTS... KEEP EM NICE AND CLEAN.... and MOST IMPORTANTLY SHINY, CAUSE GIRLS DON'T LIKE RUSTY NUTS.