These nuts replaced the original Ford factory nuts. Before ordering I checked with McGard and confirmed they are correct (i.e. fit the car and Ford wheels and my factory key). More information on what's going on with Ford nuts can be found with a simple web search. I didn't know about this problem until my last service at Ford and in fact I pulled the key out of the spare wheel well and none of the 20 nuts fit. You will most likely need help if you find yourself in this situation. McGard informed me that this product is a solid steel construction. They come with a long-term corrosion guarantee and are a lot cheaper than factory replacements (which are still two-piece).