BKL Single 1" Offset Ring, 3/8" or 11mm Dovetail, 0.60" Long, Black BKL 1" Single offset ring Fits 3/8" or 11mm dovetail 0.60" clamp length 0.60" ring length 1.35" offset 2" overall length 0.774" from bottom of mount to bottom of scope tube 1 hex screw secures the base 2 hex screws on the ring cap Black 2 oz. Includes 1 (one) ring and a hex wrench