Warne 1in Quick Detach Rings - High - The Rimfire rings are designed to fit a very wide selection of rifles with either a 3/8in or 11mm dovetail. This is made possible by using a solid asymmetrical reversible clamp that can be flipped 180 and used on wider or narrower dovetails for the best fit. All steel rings with a horizontally split design Assymetrical reversible side clamp fits a 3/8a ^2 or 11mm dovetail. Securely mounts to firearm with Torx style T-15 socket cap screws, 25 in/lb. of torque recommended.