The strongest small bore scope rings available. Designed to fit a very wide selection of rifles and fit both 3/8" and 11mm dovetails. This is made possible by using a solid steel asymmetrical reversible clamp that can be flipped 180degree and used on wider or narrower dovetails for best fit. Note: Reversible clamp allows scope to be mounted on the centerline of the receiver.Specifications and Features: Country of Origin: United States of America Extended: No Finish: Matte Black Height (Base to Bottom of Tube): 0.4 Inches Height: Medium Material: Steel Style: 3/8" and 11mm Dovetail Tube Diameter: 1"