attempted to mount new rims today

Was going to mount my new rims and tires today. Realized I didnt get the lock key for the lugs when I bought my car last fall. So.....I beat a smaller socket over the lock and attempted to remove. It spun the lock smooth rounding out the grooves. Please help, any input appreciated! I can't use my car till I get it inspected(bought in ohio) and the tires that came on it are shot.
Frustrated bad.
 
trying to avoid that. Part of the problem was I was at parents with limited tools. All my tools are in my service truck(I am a heavy equipment road tech) I am sure I can get it off once I get it out to my house, just curious if anyone had a trick or something.