• Proudly Designed and Made in USA• Medium Profile Precision Optics Interface (P.O.I®) Scope Rings Have a 30mm Center Height to Fit 30mm Tube Optics with up to a 59mm Outer Objective Diameter• The innovative Precision Optics Interface (P.O.I®) Addresses 3 of the Most Critical Areas in Scope Rings - a) Progressively Machined and Precise Inner Diameter to Achieve a Seamless Interface Between the Scope Ring and Tube b) Torx Screw Locking Side Plate Controlled by Dual Spring Loaded Guide Rods Precisely Clenches Dovetail Rail for a Secure and Repeatable Zero Hold c) Removable Threaded Recoil Stop-pin Provides an Additional Interface Point with the Dovetail Rail for Added Security Against Bidirectional Recoil• Original Snag-free Contoured Profile with Reduced Weight and Size• 6061-T6 Aircraft Aluminum and Steel Construction with a Matte Black Finish• 2 Piece Ring Set, Each Equipped with 4 Top Torx Screws, Mounts onto Most Dovetail Rails