Burris Signature Rings are a real breakthrough in ring design. Each ring includes a set of self-centering, synthetic inserts that won"t scratch the scope, yet provide perfect alignment of scope and rings and near 100% contact between the rings and scope; there is never a need to lap Burris Signature Rings.Features:- Material: Steel- Style: Dual Dovetail- Size: MediumSpecifications:- Ring Diameter: 1- Ring Height: .270- Color: Gloss Black