Mine is an awesome thing that Fanboy made.
Although I have been thinking of changing it again. (It's very lopsided in the direction of Half-Life.)
I thought about changing it to a nut (like, a hexagonal thing with a hole through the center) with a bandage tied through it to form something similar to an object which could be used as a flail.
But it wouldn't be used as a flail. It would be thrown. In the Zone. To detect anomalous energy.
It would be a nod toward STALKER and Roadside Picnic, the game which led me to the book, which sparked my infatuation with Russia and a very large change in the kind of media I exposed myself to (music, books, games).