Nipple wrench (black powder) explained

Relating to black-powder firearms, a nipple wrench is used to unscrew nipples which hold percussion caps.[1]

References

  1. Book: Randy Smith. The Black Powder Plainsman: A Beginner's Guide to Muzzle-Loading and Reenactment on the Great Plains. 20 June 2012. Skyhorse. 978-1-62087-419-6. 143–.