Signature rings are the most significant technological advancement in scope mounting history. Signature rings are for the shooter who demands the best performance from his equipment and is a practical thinker. The benefits of this revolutionary design are many consistent accuracy, tremendous gripping power, scratch-free and stress-free mounting and scope value preservation. By putting a synthetic pivoting insert within a steel outer ring, your scope-to-ring surface area contact becomes virtually 100%. Burris rings and bases have long been favorites of custom gunmakers because of their strength, beauty, and fit. It's easy to recognize Burris' leadership role in scope mounting systems when you consider the myriad of innovative designs and manufacturing processes that result in rock-solid performance. Each ring is made from a solid piece of steel with the top and bottom half perfectly mated. Zee rings with no moving parts are the best fitting and most positive gripping Weaver-style