Streamlined eye-pleasing appearance blends in perfectly with traditional scope rings while helping to eliminate accuray-robbing canting errors. Easy-to-see offset level helps you make immediate corrections without taking your eyes off the target. Attaches to your riflescope like a traditional scope ring; halves clamp together with two steel Allen head screws. Aluminum construction, hardcoat anodized, matte black. Reversible design works for left- and right-hand shooters.