Security lug nut (key missing)

Lost original key and I wanted to buy a key to remove these, and from what I can tell it appears to be a "7 spline" but i'm not sure what dimensions. I may just go look on Amazon. Let me know if I have this wrong

 

You can probably go to your local discount/America's tire and they should carry that key.

 

I remember discount tire taking off my wheels to put new tires on them, but I called them and they say they only have 6 spline. I have about 2 hours to get something overnight from Amazon but everything seems to be 6 spline.

 

Sometimes you can drive a smaller socket onto the keyed lugnut and get it off. You would then, obviously, have to get new keyed lug nuts. Just an idea in an emergency that has worked for me. Good luck.

 

Good idea. I found some Irwin bolt grip sockets that are used to remove pretty much anything, even rounded off bolts.

 

Gator grip sockets work as well.