PRODUCT FEATURES 30mm Dia., 0MOA Type, Fit Max 56mm Scope Objective Lens, Six Screws Per Ring, 35mm 1.4in Bottom to Ring Center, Extremely Accurate w/ Full CNC Machined Hard Anodizing, 21mm Picatinny Mount w/ 3 Crossing Bolts & Anti-Retreat Rings Can Accept Max 45 Inch / Pounds Torque Force for Big Nuts When Installing the Mount on the Picatinny Rail SPECIFICATIONS Diameter: 30mm Overall Length: 154m / 6.1in Overall Height: 59mm / 2.3in Mount Length: 154mm / 6.1in Ring Width: 45.5mm / 1.8in Central Height: 35mm / 1.4in, bottom to center Ring Length: 26mm / 1.0in Gap Length: 70mm / 2.8in Material: 6061-T6 aluminum alloy Weight: 240g / 8.5oz Mount: Picatinny Finish: Hard anodizing in black matte Screws per ring: 6 High-durability aluminum alloy in black matte, designed for big recoil calibers Do not use over 18 inch / pounds of torque on the scope rings&'; screws Suggest 25 inch / pounds (Can Accept Max 45 Inch / Pounds) torque force for big nuts when installing the mount on the picatinny rail Designed for hard and rigorous use With hex key and retail package, hex key can be used to fasten the clamp nuts