You get all the parts in the first picture.

1 new unused 360 degree rotation device for cantilever umbrellas. Just step on the lever and rotate the umbrella all the way around. Dimensions in the pictures are roughly 4-3/8"  and 3-1/16". Please check to make sure everything will fit. The screws are m8-1.25mm. You can use different ones to mount the rotation unit to the x depending on what threads it has.

You can install this on the x base like in the picture or install it on a 6" x 6" piece of wood and install it in the ground.
If you want to install it in the ground you will need to by the aluminum base plate which I also sell on this site.  
This works great next to a picnic table. When done with eating you can rotate the umbrella around and have the baby or kids on the ground in the shade.

#   394341668090
Copy and past that into search bar.