Warne 1 Inch Magnum Maxima Scope Rings are vertically split rings, precision-machined from steel bar stock to hold large objective, heavy scopes firmly against recoil. Finished to exacting tolerances so the scope returns to zero, even after repeated dismountings. Permanent mount (PERM) uses two socket screws to solidly lock rings to base, especially suitable for rough duty applications. Quick detach (QD), double lever rings clamp quickly and securely; dismount in an instant when you lift the lever. Once locked, the levers can be repositioned so both rest at the same angle. Ultra High rings put scope at correct height for flattop AR-15's and H&K SL7 rifle.