Kept in pairs throughout the entire manufacturing process and held to tolerances of just 0.0005" using a CNC mill, this set of two 1" Precision Matched Rings from Vortex provides an almost unmatched quality and consistency that ensures appropriate mounting of your riflescope. This version permits mounting on Picatinny/Weaver rails and will position the center of the scope tube 0.76" above the base. It also uses exceptional Grade 8 fasteners for securing the scope and each ring is vibratory tumbled and hand bead blasted. For durability, the rings are constructed from 7075-T6 aluminum and feature a Type III hard anodized coating. The rings are serialized and made in the USA.