The couple of hangers is very easy, even under adverse conditions. With the Dockingboy no longer the push rod is jeopardized, because the coupler is exactely beyond the ball socket of the hanger, ready to couple. And now just a draw at the red hand grip, a turn of the limit plate to the back into the driving position and your are ready to go. The Dockingboy is approved for fixed drawbar hanger with V-formed draw bars, the hanger must be equipped with a crank support and the mounting screws (M 12) must have a distance of 100-150mm. TÜV -tecnical certificated.