The carrier hooks over the top of the door in the same way the VW bike rack does. It then requires you to drill two holes in you door skin under the window reveal to stabilise the carrier.
These are drawn in CAD initially before being cut on CNC, parts pressed by us in our shop, and assembled by us in our shop.
If you have a spoiler then you will need to cut two slots through it for the carrier to sit through.
Although these were designed to fit on barndoor models, they will also physically fit on tailgate models. On tailgate models you must uprate your struts. You will need to either buy adjustable struts, or have some made (there are plenty of companies who do this - google!). Without uprated struts, the tailgate will be very heavy to lift, not stay up and will come down with a lot of force - which may damage your door skin.
It is supplied out bare steel for you to paint as you wish.