Titanium Skull EDC Knuckle Duster Ring and Keychain Self Defense Tool

Shape: Skull single-hole brass knuckles
Size: about 5.0 cm long, about 3.7 cm wide, about 0.7 cm thick, about 2.3 cm hole diameter
Material: Titanium alloy TC4
Process: CNC sandblasting
Style: Simple
Weight: about 27 grams