The Weaver Grand Slam 30mm Medium Height Scope Rings feature a sleek modern design with four-hole construction and Torx screws for maximum gripping strength and security. Built with Weaver's legendary cross-lock design for ultimate scope lock-down.Weaver Grand Slam 30mm Medium Height Scope Rings - BlackMade of solid steel construction for aggressive recoil resistanceNo-Slip/No-Strip Torx Head ScrewsIntegrated Square Recoil LugFits Weaver Style BasesManufactured to exact tolerances in the U.S.A.Engineered for serious shooters who demand reliable scope mounting with superior strength and precision craftsmanship.