I put this hinge on my 10+ kg home-built 19" rack. Including instruments it currently weighs ~17 kg. The hinge starts to bend quite a bit with this weight but is still quite comfortable for short distances (anyway 17 kg is a lot already). It would have been nice if the design weight would have been indicated. For now the hinge holds, but I'm not constantly dragging the rack around. For the weight of the rack it still feels sturdy and solid, not wobbly. Nevertheless I would not use it for much heavier equipment.