Our proprietary steel alloy ALPHA3 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 3 Scope Mounts: To Rail (1/2in Nut): 65in/lbsTo Scope (T15-TORX): 25in/lbs Sig Sauer ALPHA3 30mm 1.375? Titanium Black Scope Mount SOA30001