This is the jack adapter that FM recently came out with. This is for when you want to jack up the middle part of your car so you can easily rotate your tires. However, you can also use it jack up your car in the normal jacking point to prevent damaging in that area. A week ago I used my floor jack to jack up the front part of my car, and after I dropped the car I noticed that my jacking point was slightly bent. It bothered me so I bent it back with an open end wrench and it was good as new.However, I didn't want that to happen again, so I bought the FM adapter and Problem solved. If your planning to keep you roadster for a while and don't want the nasty look of the bent rails then this is worth the investment.
This is the picture of the wonderful little tool.