Here is one of the floating lower links. You can lock them in place like I have here or remove one of the pins and they will float up and down so it folows the ground. I am very, very pleased with the two first choice pieces. They have been well engineered and thought out. Making maintenance easy and low. I know I will get many years of use out of these implements. I look forward to getting a broadcast spreader next. Now I have to fertilize the grass so I can get more seat time with the mower!!!!!!