"The Burris Optics 420571 Signature 1"" High Matte Black Double Dovetail Ring (Pair) is 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 Optics steel outer ring, your scope-to-ring surface area contact becomes virtually 100%. Prevent ""Ring Marks"" On The Finish Of The Rifle Scope Tube By using precision-made, tight-gripping inserts made of a dimensionally-stable synthetic material, the riflescope is not scratched or crushed which often occurs with conventional rings. With Double Dovetail Signature Burris Optics 1"" Rings, when the scope is mounted in different positions or moved to another firearm. Grip The Scope Better Burris Optics Concentric synthetic inserts Gripping the rifle scope tube are made of a material slightly softer than the hard-coat anodized rifle-scope tube. The Burris Optics inserts are manufactured by a process that nearly eliminates tolerances and produces incredibly consistent parts. The inserts are slightly wider than standard BURRIS steel rings which increases the potential surface area contact by 12%. (Burris Optics standard riflescope rings already provide 10% to 30% more gripping area than many other popular brands). With the Burris Optics synthetic inse"