What are some Non-Lethal melee weapons from pre 1700s? - Quora
What's a blackjack weapon? - Quora
Question on a leather blackjack club -- myArmoury.com
Striking Distance: The Ultimate Blackjack Weapon Buyer's Guide | RECOIL
This hobo self-defense tool is called a "monkey-fist". It has a steel weight at the end, and it can easily shatter bones or damage vital organs in a single swing. : r/vagabond