Ruffs Precision Precision Scope Rings Features The Ruffs Precision Precision Scope Rings are built around a 30mm tube diameter with a co-linear bubble level integrated into the ring body itself visible from the shooting position using the shooter s non-dominant eye. This built-in level significantly aids accurate scope mounting by giving a constant reference to cant during the mounting process eliminating the need for multiple small clamp-on levels and the balancing act that comes with them. The ring body and cap are machined from 6061-T6 aluminum giving the set the strength needed to hold a scope securely under recoil. An alignment lug ensures the cap and base stay properly aligned during cap screw installation keeping the clamping pressure even across the tube. A 303 stainless steel cross bolt and nut provide the clamping force that locks the rings to the base rated to a recommended torque of 45 in-lbs for the cross bolt and 18 in-lbs for the cap screws. At a low ring height of .885 and a total weight of 3.9 oz for the pair these rings keep the scope mounted close to the bore for a more natural cheek weld. Proudly made in the USA the Precision Scope Rings are built for shooters who want precision-built hardware with a practical built-in solution to scope cant. Long-range shooters setting up a new optic will appreciate the time saved by having a level already built into the mount. Ruffs Precision Precision Scope Rings Specifications Manufacturer: Ruffs Precision Model: Precision Scope Rings Tube Diameter: 30mm Color: Black Material: Aluminum Ring Height: Low (.885) Pieces: 2 Ring & Mount Type: Weaver Style Weight: 3.90 oz Available At: GrabAGun