4 screws instead of 2 screws, make scope mount more stable and secure, help your scope hold the recoil
Design in hollowed-out configuration between the ring and the bottom of the base, to release heavy duty when clamping your scope
Built-in tape inside per rings to prevent from marring the scope, also prevent sliding and holding postion accurately
Precision Machining of Aircraft Grade 6061 Aluminum Alloy + High Strength Steel In Black Matte Anodizing Finish, Sturdy & Lightweight Construction, High Quality, Sturdy Construction, Build No Wobble, Offer Durable Safe Performance In The Field