It is a military helicopter tail rotor cover, purchased for a staggering three dollars. I was willing to invest that sum to satisfy curiosity. I'm having a little trouble figuring out a practical use for it. So far the only thing that comes to mind is stacking firewood into a truncated replica of a Celtic stone tower and employing it as a cover.
Naaaah. Too much like work.
But maybe the grin alone is worth the three bucks. I mentioned the McNamara 100,000 a little while ago, but darned if I suspected the Army turned them into chopper pilots.