ELI5: Explain Like I'm 5

Nipple wrench (black powder)

Okay kiddo, so a nipple wrench for black powder guns is a tool that helps you take off and put on a little tiny cap that goes over a hole in the gun. This hole is where a spark comes out and lights up the gunpowder, so the gun can shoot.

The nipple wrench looks like a little stick with a square end that fits on top of the tiny cap. You use it to twist the cap off so you can add more powder or clean the gun. Then, you can use the wrench to put the cap back on tight, so the gun works properly next time you shoot it.

It's like taking the lid off and putting it back on your sippy cup, but way cooler and more grown-up. It's important to use the nipple wrench carefully and only when an adult is around, because black powder guns can be dangerous if not handled correctly.