Tobias Wong makes engagement rings that can kill you. The inverted diamond sets the point side up , turning it into a potentially lethal weapon. The edges of the ring are soft so it won’t cut into your own skin during as you slash away at your victim. It’s a functional fashion statement that asks, “Will you marry me?” while also empowering you to take matters into your own hands should things get nasty. A 1-karat stone can eviscerate flesh to the bone.