I'm not really sure what to think.
DESIGNER: Sruli Recht
PRICE: US $330
This is an umbrella with an 'ergonomically positioned knuckle duster handle configuration'. It has been listed as a class 5 weapon in the US, and owning one requires a weapons and/or gun license.
The Unbreakable Umbrella comes in both the crook and straight knob handle varieties, and is legal all over the world. Although it is as strong as a steel pipe, it weighs only 775 g. Oh, and there's a video: