Machine Parts found on the Moon

The skeptics are going to be hard pressed to call this one a "trick of light
and shadow" or "its just a rock" In the main anomaly detailed below
you can see two round cylinders with a serrated but symmetrical edge.
One is partially buried. In the second one (B) you can see a very obvious
gear on a shaft, with a flat flange or mounting bracket at the top.
The overall impression is that of two pieces that belong together,
with the gear shaped object being on the inside of the cylinder.