Burris 1" Signature Rifle Scope Rimfire / Airgun .22 Rings are for the shooter who demands the best performance. The benefits of this revolutionary design include consistent accuracy, tremendous gripping power, scratch-free and stress-free mounting, and scope value preservation. By putting a synthetic pivoting insert within a Burris steel outer ring, your scope-to-ring surface area contact is virtually 100%. Burris 1" Signature Rimfire / Airgun Ring Pair is shipped with one set each of concentric inserts. Burris Signature 1" Rimfire / Airgun .22 Ring Pair fits ".22" grooved receivers.