Several mixed reviews left me guessing. I discovered the following: 1. These rails are not like the ones in the picture on the add. They only have three connection points in lieu of the four shown. I installed them anyway and I find that the three mount points are more than adequate for my 270 pounds. 2. The removal of the old rails and installation of the new ones can be accomplished by a 63 year old by themselves. I ended up laying on the ground with the rail on my chest to get the first (middle) bolt loosely into place. Once the other two ""body"" bolts were in place, the four ""pinch"" bolts were easy to work into place. 3. Be sure to follow the order given for tightening the bolts. first comes the ""pinch"" bolts, then the ""body"" bolts, and then the six bolts that hold the brackets to the rails. Following that order allowed everything to work into the correct place to get really tight. I had to remove the lower of the two nuts in this last set to get the upper nut tight. I then replaced the lower nut and tightened it. 4. All told, it took me 89 minutes to open the box, unwrap the rails, put the brackets on the rails, remove the old rails, and install the new ones. The breakdown was: 25 minutes to open/unwrap/put on brackets; 17 minutes to take off the first rail (12 bolts/nuts); 20 minutes to put on the first rail (7 bolts/nuts); 9 minutes to remove the second rail (learning curve); and 18 minutes to put on the second rail. Add a little time to get all of the tools out, put all of the tools up, and break down the box. All-in-all.... I am very happy with my purchase and happy that I took on the task of installing it myself. You do need some basic ""tool knowledge"" to pull this off.... but, it is worth it. My 5'-0"" wife can now ""scamper"" up into our new Jeep with much less effort than before!