A kit of components for use in assembling different agricultural implements includes (1) multiple linkages each of which includes a pair of parallel arms mounted for vertical pivoting movement at a first end of the linkage, and adapted to be coupled to a tool-support arm at the second end of the linkage, the multiple linkages having different sizes, (2) multiple coupling elements for coupling said linkages to a toolbar to be attached to a tractor, (3) multiple tool-support arms adapted to be connected to the second ends of the linkages, and (4) multiple tools adapted to be mounted on the tool-support arms.
