Nightforce’s X-Treme Ultralite Rings deliver the performance of steel rings with half the weight. The rings are precision machined from solid 7075-T6 aluminum, and the crossbolts and jaws are made from titanium. This innovative construction delivers unmatched strength and a solid interface between the rifle and mounted optic. The X-Treme Ultralite Rings are available in multiple ring diameters are well as centerline heights and come in either four screw and six screw configurations. Features: Ring material: 7075-T6 aluminum Crossbolt/jaw material: titanium Available in multiple heights and ring sizes Available in 4-screw and 6-screw configurations (50% more clamping force with 6-screw configuration) Nightforce UltraLite 1.375 X-high 30mm Ring Set A110