Swivel the nob to tighten the scope ring mount. With knurling design, you can effortlessly put pressure on tightening.
The center of the riflescope tube at a height of 1.37 inches (55mm) from the base.
Each side has one screw to install, which is very easy and secure. Built-in tape enhances stability.
Those scope rings fit 20 mm picatinny rail. Come with two rings and one allen wrench, you can put your 1-in rifle scope on it.