lock nut removal tool?

[GasSavers_BEEF]

my wife got tires from Wal-mart about 2 years ago. I went to rotate the tires on her element (I know, needed to do it much earlier). I found that our highly trained mechanics at "THE WAL" decided to keep the key to my safety lock nut on my tires. I have factory alluminum rims so it isn't like I even care about keeping them safe.

I have been told that there is a tool for taking these lock nuts off without having the key. I have also been told that it all but destroys them but at this point, I don't care.

also of note is that these have the pattern on the inside and the outside of the nut is round. also, they are flush with the rim. not really inset but you can't get a set of vise grips around them without damaging the rim.

if any of you know what I am talking about, I would appreciate some direction. my only other option is to call the honda dealership and get another key. I haven't checked but I am sure that it is going to be expensive.

thanks for any help in advance.