Well 25 gun and reloading knowledgeable people responses so far has not come up with an identify answer. I am pretty sure it is not a throttle body linkage unless it came off a magnetic propulsion system on an alien space ship. (unlikely). It however looks to be a possible important part so you would be wise to keep it, and to do so in a safe place. Because of the location it most likely came off something you own , and will become apparent when something you own malfunctions. Best of luck with your research and hope ID of the part can be found soon. My best guess is that it is not a gun part, but if it is considering its size, I would be looking at a rifle part rather than a pistol part, but who knows ? Since I have never seen this before if it is a gun part it should be a newer type product as I stopped doing gun work about a decade ago. I would look carefully at your reloading equipment, or other devices you have in the room. Good luck