The finishing touch to your rifle and optic combination. Pro Series rings combine rock-solid reliability and strength with high quality machining to ensure ultimate accuracy and consistency. Streamlined, lightweight and durable, these rings use four T-25 Torx-style socket cap screws for secure mounting. Available in two heights for 1 inch tubes and four heights for 30mm tubes. Weight (Per Ring): 39.9 Grams - 1.41 ozPrecision Machined 7075 T6 AluminumHard Coat Matte Black AnodizedLaser Engraved Torque SpecificationsRobust #8 FastenersIntegrated Recoil LugFits Weaver and Picatinny RailsT-25 Torx Screws