The WARNE RUGER 77 Fixed, M77 & Hawkeye Rings, 1in., Medium, Silver (1R7S) are designed to be the strongest, most durable fixed mount system available. Typical steel scope mounts in this class use only 2 screws per ring, have a narrower clamping band and in most cases only absorb recoil in the front ring. Maxima Fixed rings utilize 4 T-15 Torx style socket cap screws for secure optics mounting.