Feature Super Low Profile, 28mm / 1.1" From Bottom to Ring Center, Six Screws Per Ring, FDE Extremely Accurate w/ Full CNC Machined, 11mm Dovetail Mount w/ Anti-Retreat Pin Specification Ring Diameter: 30mm Overall Length: 144m / 5.7" Overall Height: 48mm / 1.9" Mount Length: 144mm / 5.7" Ring Width: 45mm / 1.8" Central Height: 28mm / 1.1", bottom to center Ring Length: 26mm / 1.0" Gap Length: 63mm / 2.5" Material: 6061-T6 aluminum alloy Weight: 127g / 4.5oz Mount: 11mm dovetail Finish: FDE Screws per ring: 6 High-durability aluminum alloy 6061-T6 Do not use over 18 inch / pounds of torque on the scope rings&'; screws Suggest 18 inch / pounds torque force for big nuts when installing the mount on the dovetail rail Adjustable anti-retreat pin designed for hard and rigorous use With hex key and retail package, hex key can be used to fasten the clamp nuts Realtions Video