went and got some new rear tires today, i burnt up the other ones, but when we went to put them on, those cheap ass locking lugs someone put on were stripped where the key goes in them, i got them off by hammering a socket onto them then hitting it with an impact wrench. on one wheel, the lug had been cross threaded on and the stud broke off with the lug. so how do i replace this stud? would it be best to jsut replace all the studs at one time? can i do this without having to take it to a machine shop?