Steel Knuckle Duster Self Defense Broken Window Backpack Decoration

Size: 72mm*50mm*12mm
Material: 3CR13
Technics: surface silver titanium plating
Weight: about 197g

This knuckle is designed with an integrated structure, suitable for outdoor exploration, emergency window breaking self-defense, and comes with a lanyard that can be hung on a belt or backpack as an exquisite decoration