Warne makes the smallest and most stable small bore scope rings available on the market today. These steel rings are designed to fit rimfire rifles which have a 3/8" or 11mm dovetail groove. The rings will mount securely to your firearm with a Torx style T-15 socket cap screw and it is recommend that you use a torque wrench in order to apply the 25 in/lb's of required force for securing the rings. These rings are made from solid steel and features a Matte Black finish.