The Wheeler Picatinny-Style Rings are your next go-to ring. These rings are constructed from 6061 aluminum, and engineered to have a flat top to aid in leveling. The 6-hole ring design keeps the scope locked in place, even atop some hard recoiling rifles. Another feature is the integrated anti-cant level that swings out for your convenience. The anti-cant level helps keep your reticle level when shooting at long distance. Features:6061 aluminum construction with flat top on ring for leveling6-hole ring design with retained lock nuts that secure to picatinny railIntegrated anti-cant level swing outIncludes torx screws