AFK Knuckle Duster Fluorescent Self-Defense Finger Keychain

Material: PA plastic + imported fluorescent, special material
Length: 53MM
Width: 37MM
Thickness: 15MM
Ring Diameter: 23mm
Weight: about 27g
Unique Properties: Luminescence (through the light source to absorb energy, and then to the dark place can release light, produce a fluorescent effect)
Light sources include but are not limited to sunlight, lights, fire, and other luminous bodies.
Scope of application: outdoor self-defense, broken window survival, keychain