Give your favorite optics proper support using the Weaver 1" Detachable Extra High Extension Top Mount Rings. This pair of rings is compatible with 1" maintubes and can be mounted on Weaver-style rails. The extension on one ring allows users to adjust the mounting position of the optic forward or backward to achieve an optimal eye relief. To reduce weight, the saddle is made of aluminum while the strap is crafted from steel to improve strength and durability.