This is a set of extreme duty ramps for 7,000 pound flatbeds. If you have a need for these ramps, then you probably also have a need for four extra crossmembers and the flatbed style of trailer. They are made out of 3" channel and have supporting feet for taking the strain off of your coupler and hitch while loading. They are removable if necessary, but they usually flip up and lock into place for ease of use since they are so heavy and clumsy. You can use these for vehicles just fine, but they are mainly for tractors, skid steers, and other similar equipment that puts a very large amount of weight into a very small area. If you get these, it is recommended that you also purchase the dovetail option, since that will put the ramps closer to the ground. Otherwise, if the trailer is flat, the supporting feet will still be off the ground a little as shown in the pictures.