magnet and whistle, absolutely! Thanks!

I thought, some kind of 'knockout gas' which has long been a staple of pulps and comic books, but I can't find any evidence that such a thing really exists, at least in quantities small enough to carry in a crowded utility belt.

The story I'm writing is the first time she makes use of her utility belt, so it will probably evolve over time, and may be lacking in some items that she discovers are necessary. Glad she's gotten some good advice from some close friends, because she had already overlooked the whistle and magnet. I