Tube Diameter: Fits riflescopes with a 1-inch maintube. Ring Height: High (typically chosen to clear larger objective lenses or for comfortable eye alignment on specific stock designs). Finish: Matte Black. Material: Machined steel construction for maximum durability. Mechanism: Uses a patented eccentric lever system. Turning the lever forward pulls the ring down and forward into the base, locking it tightly into its original zero position. Return-to-Zero Accuracy: Guaranteed to return to within +/- ΒΌ MOA (or within 0.5 inches of the original point of impact at 100 yards) after being detached and re-secured.