Weaver Grand Slam Steel Top Mount Rings (X-High, 1-Inch, Black)Weaver Grand Slam Rings have been engineered and manufactured to instill confidence, confidence that your ring will not fail when you are making the shot of a lifetime. Each Grand Slam Ring starts as a piece of solid steel bar stock and is slowly and meticulously machined into a finished ring. Each ring features an integrated square recoil lug for superior ring to base contact offering maximum recoil resistance for the ultimate hold on your scope.