Pulling everything apart, you've got a fair bit going on. As far as the nuts and bolts go you can see everything that we have below which includes some washers, bolts, screws and a pair of allen keys.
Going through some of the parts, you can see our three main mounts that go onto the back of our monitors and attach to the stand. You can see a couple of holes at each corner; which one you'll use will depend on if you're using a 75mm or 100mm VESA mount.
Looking above, you can see the main parts. The top and third items are our two arms while the one that sits between them is the main center piece. At the bottom we have a pole that goes into the middle and holds all pieces together.
Here we can see the base of the stand; it's not small and does have a fairly large foot print, but this isn't really a surprise as it does have to do the job of what three stands would normally do.