Just some FYI I did put my floor jack on the tube section of the sliders dead center not the flat section under the jeep but the tube section that sticks out further then the jeep and jacked my jeep up. I would consider this the weakest part because it sticks out the farthest I got very little movement on the sliders. I was very happy with how they held up being stressed from this point. keep in mind that my pinch weld and the area they mount to where already banged up. So my install will be weaker then anyone else that installs these with straight sections of metal to mount to. I hope I'm making sense.