These are our European design quick detach rings. The levers wind down on a steel crossbolt unlike our competitors' rings that have a silver solder casting PIN that can break. Our rock solid steel crossbolt design will take the pounding of heavy magnum calibers. Levers have a re-index feature to 6 different positions after the rings are tightened to the base. Saddle height is 3/8" (low-med)