Medium Size Pea Knuckle Duster - Self-Defense Tool

Material: Steel
Size: 97mm*40mm*14mm
Rope hole diameter: 5mm
Finger hole diameter: index finger: 27mm*23mm, middle finger: 26mm*22mm ring finger: 25mm*20mm, small finger: 22mm*19mm
Thickness: 14mm
Weight: about 150g