Hanging Buckle Self-defense Knuckle Duster

Material: 304 stainless steel
Size: 72mm * 51mm * 10mm
Finger hole: 24mm
Weight: about 90g

Mini portable multi-functional quick-hang knuckle, the front end contains a window breaker cone, DC53 heat-treated hardened steel (removable), which can easily break windows, it can be hung on your pocket or backpack, and it works in an emergency.