✔ The scope rings are designed for most diameter 1''(25.4mm) scopes.
✔ Double scope mounts can install on all 20mm picatinny/ weaver rail (20mm) solidly.
✔ They have high profile in height, 0.94 inches from base of mount to bottom of rings. Help you to adjust the sight to a more convenient height.
✔ Built-in anti-slip tape to fix the scope firmly, and also prevent the scope from movement.
✔ Come with a allen wrench, you can tighten the top two screws with it. Then just twist off the below nut by hand,and mount the base on 20mm rail easily.