Abstract: A folding toolbar adapted for attachment to a draft vehicle for carrying ground working tools, such as rotary hoe wheels, includes a main frame section and lateral wing sections pivotally connected to the main frame section for upward folding to transport positions. One of the wing sections is foldable through 180.degree. to overlie the main frame section in relatively close proximity thereto, while the other wing section is pivotally connected to the main frame section through a pivot link arrangement and a power cylinder which enable 180.degree. folding to overlie both the main frame section and the opposite first folded wing section. An auxiliary frame member is mounted is spaced relation on the main frame section and provides arrangement for mounting the wing folding cylinders so as to allow substantially the full length of the main frame to be used for mounting tools thereon.