Nickel Wurks Bolts are all Forged from High Carbon steel, class 10.9 Hardened Nickel Plated. These bolts rival titanium's good looks but at a much lower price. These bolts were engineered by Specbolt in conjunction with top engine builder Rob Selvy. He is so stoked about these new bolts he even loaned us the Selvy trademarked "Wurks" name for these.