RUSK Engineering Heat Freak Professional Ceramic and Tourmaline Straight Iron Review BunBunny August 20, 2018 August 20, 2018 No Comments on RUSK Engineering Heat Freak Professional Ceramic and Tourmaline Straight Iron Review Size:1-1/2″ Product Description Heat freak ceramic and tourmaline str8 iron hair straightener 1.5 inch Brand Story RUSK is one of the premier salon brands in the world.