Our proprietary steel alloy ALPHA Hunting Rings 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 1913 rail styles Covered by SIG SAUER's Infnite GuaranteeSpecifications: To Rail (T15-TORX): 25in/lbs To Scope (T15-TORX): 25in/lbs Material: Aluminum Attachment Type: M1913