Talley Scope Mount/Ring Combo features a 1 tube diameter and Low mount height (0.450) for Ruger 10/22 rimfire rifles. Crafted with a black anodized finish, this 2-piece set weighs 2.20 oz. Unitized ring and base design mounts direct-to-receiver via included 6-48 Torx hardware and T-15 wrench for a rigid, lightweight optic setup. Safety Note Always ensure the firearm is unloaded before installing or adjusting any optics or bases. Verify proper torque specifications during installation. Improper mounting may affect accuracy and safety.