Maxmia Horizontal scope rings are designed engineered and manufactured by our expert staff in Tualatin, Oregon. Utilizing proprietary sintered steel technology, Maxima Horizontal offers unwavering strength and precision in a stylish, yet traditional form. 4 screw ring caps, along with a unique recoil key and clamp offer easy installation and unrivaled holding strength. With classic lines, and Warnes return to zero guarantee, Maxima Horizontal are the new standard. Product Details CNC machined from sintered steel for superior strength and clamping benefits. Square, permanently installed recoil keys for positive engagement of ring to base. Rings mount securely around scope using 4 Torx T-15 cap screws, 2 screws for each clamp STANAG 4694 interface allows for better return to zero and rigidity Fits both Picatinny & Weaver style bases Available in 1 inch and 30mm Designed and Made in USA