Vortex PR30-XH Pro Series 30mm Rings 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. Features: Type 2 Matte Black Anodized Laser Engraved Torque Specifications Integrated Recoil Lug Made in the USA Specifications: Model: Pro 30mm Base Clamp Screws (in / lbs): 30 Ring Screws (in / lbs): 18