BUTTERFLY knife
The "butterfly" knife was made with steel blade and zamak handle, lighter, black anti-reflective color
The Butterfly knife is known for the peculiarity of his handle, this opens in two parts to discover the blade.
This knife, originating in the Philippines, was used during the Vietnam war.
For safety reasons and regulations , these knives have sharpening only in one side, unlike the originals which had it in both sides.
Nowadays butterfly knife is often used for martial arts performances and for skill games.