GIVI Top Box Carrier Plate Monokey Base M3 It's built to be sturdy. I used it for about two years, attached to the rear carrier of a ZZR400. Out of the four rubber cushioning pads that sit between the bottom of the top box and the plate, three are missing. It didn't cause any problems during use, but if you're concerned, you might want to substitute something. The parts that secure the plate to the carrier are labeled "Monolock," but Monokey plates can also be attached.