"It's a modular tool, basically a wrench. Each part is just a piece of metal on its own, totally harmless. But if you assemble it the right way, it can serve as self-defense, acting as brass knuckles, folding knuckles, or collapsible knuckles. Still, as it is now, it's just a regular tool.
You can even use a single piece as a thin two-finger knuckle with a palm rest. If you sandwich 2-3 pieces together, it becomes a stronger two-finger setup. Combine two pieces side-by-side, and you get a three-finger knuckle (no pinky). For a full four-finger knuckle, you can assemble three pieces, or go for four pieces to make it thicker and more solid. The kit includes all the bolts you need to configure it however you like.
It’s a foldable, pocket-sized tool that works as both a knuckle and a pretty versatile wrench. The hex openings aren’t 12-point but 6-point, so they’re better for high-force use, like tightening or loosening tough bolts, or even softer plastic nuts. You can use it with a breaker bar or just your hands, depending on the situation.
When used as a knuckle, the design prevents accidental folding of the tool, though it doesn’t have a dedicated stopper.
The price is for one module. You can choose and buy as many as you need to create the perfect tool for your needs."