ZINC ALLOY FOLDING BRASS KNUCKLES SELF-DEFENSE TOOL

It easily transforms into a self-defense knuckle-duster ring—a unique and creative design!
The connection point is extremely sturdy and resistant to breakage.
It can be worn as an ordinary ring without causing any inconvenience.
Crafted from hard zinc alloy, it is highly durable.
It is incredibly lightweight, weighing only about 100 grams.
The inner diameter is 23mm (approximately US ring size 12), fitting most people; however,
if you have particularly large fingers, please be sure to check the size before purchasing.