A Razor-Rang is one of Jade's weapons, apparently created from her Staff (as seen in her Half-Mast fatality in MK 2011). The razor-rang is an Edenian boomerang with three blades on it, making it resemble some type of sawblade.
Jade has had a variety of special moves from Ultimate Mortal Kombat 3 onwards utilizing a bladed boomerang dubbed a "razor-rang." Additionally, her Hara-Kiri from Mortal Kombat: Deception and Mortal Kombat: Unchained involved her decapitating herself with said weapon. In Mortal Kombat: Shaolin Monks, Mortal Kombat: Armageddon, MK 2011, razor-rang appears.