Rounded off wheel lock

I have a problem with a wheel lock that has rounded off. Its the type where the key goes inside the lug nut. Any help would be greatly appreciated!!!!!

You might be able to use a Gator Grip to get it off?   

find an easy out from sears or something

Autozone sales a kit made by Irwin tools that will take it off .I have used it many times to get wheel locks off also sears has a kit but a bit more $$$