Our proprietary steel alloy Alpha2 scope mounts are machined with an exactness that is both strong yet ductile that allows our rings to form around a riflescope, yet will not damage scope under proper installation. The steel rings are epoxy powder coated to prevent oxidation and resist gun oils, cleaning solutions, and outdoor exposure. Features: Steel weaver-style clamps Covered by Sig Sauer's infinite guarantee Torq specifications for Alpha-2 scope mounts - to rail (1/2 inches nut) it is 65 in/lb, to scope (T15-Torx) it is 25 in/lb