Redfield Aluminum Rings have undergone rigorous testing to ensure that they meet Redfield's tough standards for quality. These rings are manufactured from aircraft-grade aluminum to ensure that they stand the test of time no matter what kind of challenges you throw at them.If you are in the market for a pair of lightweight but durable mounting rings look no further than Redfield Aluminum Rings. These aluminum rings are the perfect solution to your scope-mounting needs available in a variety of heights for maximum customizability of your favorite weapon.