Stronger materials. More advanced manufacturing processes. Our highest level of craftsmanship yet. Monstrum Pro Series scope rings are crafted from 7075 aerospace aluminum - providing greater tensile strength, shear strength, and Brinell hardness than typical 6061 aluminum scope rings. All rings come with stainless steel Torx mounting hardware. MIL-STD 8625 Type-III Hard Anodized Finish