Multi-function Knuckle Duster Bottle Opener Self-defense Tool

The knucklSize: 75mm*52mm*12mm
Material: 3CR13
Technics: surface silver titanium plating
Weight: about 128g

this knuckle is designed with an integrated structure, multi-purpose, suitable for outdoor adventure, open bottle caps, emergency broken windows for self-defense, and equipped with a lanyard, which can be hung on the belt or backpack as a beautiful decoration