Designed as a premium alternative to factory ringmounts, the Open Range Rimfire delivers a secure, no-tap solution for most .22 rimfire rifles with 11mm, or 3/8" rails. This set of rings fits any riflescope with a 1" maintube. Specifications •Material: Aluminum •Base Cant: No •Ring Height Style: Medium •Ring Diameter: 1 inch •Ring Height (in): .78 •Weight (oz): 2.6 •Keeper Clamp Torque: 28 in-lbs •Ring Top Screw Torque: 28 in-lbs