Plastic Self Defense Key Chains Knuckle

- Preferred by Martial Artist

- Perfect for ladies to carry and use

- Light Weight, Easy to Carry Around

- Fast To Grab In A Emergency Use

- All Punching Force Concentrated To 1 Point, Easily Punch Through 6 Pine Boards

- Length: 8.0cm

- Width: 5.4cm

- Thickness: 0.7cm

- Weight: 19gm