So, there´s another of the weird works of my brother.
Looks like a common belt, but that little skull is is more than an ornament. Is actually a bolt, and if you remove that bolt You can separate in two parts the buckle, is just a prototype, he only need to replace the blade with something more resistant.
he uses it for personal defense.
By the way, sorry for the low quality image, I no longer have my camera and the photo was taken with a cell phone.