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