SME Scope Leveler Scope Mount - Streamlined eye-pleasing appearance blends in perfectly with traditional scope rings while helping to eliminate accuracy-robbing canting errors. Easy-to-see offset level helps make immediate corrections without taking eyes off the target. Attaches to your riflescope like a traditional scope ring; halves clamp together with two steel Allen head screws. Aluminum construction, hard-coat anodized, matte black. Reversible design works for left- and right-hand shooters. Models available for 1in or 20mm diameter scopes.