The double-sided operation of machines for undervine care is usually unproblematic. Although sometimes it is not required to work both sides, for example in pointed or end rows. There is also the problem of different elevation levels between the right and left worked row. These situations can easily be solves with the use of column lifters between the working machines and the tool carrier. This way, the currently unused machine can just be unhooked or the elevation difference can be balanced out. For wide row widths, the lifter can be driven in floating position. A support wheel on the lifter allows not only a perfect height guidance near the working tool, but also takes the load off the tool carrier.