PRODUCT FEATURES Heavy Duty, 25.4mm 1in Diameter, 25.4mm 1.0in Center Height High Profile 4 Torx Screws Per Ring, Extremely Accurate w/ Full CNC Machined, 1913 Picatinny SPECIFICATIONS Diameter: 25.4mm 1in Height: 25.4mm 1.0in from bottom to ring center Ring Width: 16.5mm 0.6in Weight (net): 85g / 3.0oz Finish: Black matte Material: 6061-T6 Mount: 1913 picatinny Unique construction provides strength well with steel cross-bolt Four torx screws per ring will hold your scope under any conceivable situations Perfect alignment and superior accuracy (check photo for reference, one nut on the left, the other nut on the right, still both rings&'; center aligned each other) Do not use over 18 inch / pounds of torque on the scope rings&'; screws Accessory: Torx T10 wrench Suggest 25 inch / pounds (can accept max 45 inch / pounds) torque force for big nut when installing the mount on the picatinny rail