Vortex Sport Riflescope Ring 1-Inch (Extra High, 1.5-Inch)Unlock your accuracy with Lockdown Rings, engineered for shooters who demand strength, stability, and fast setup. Built to endure centerfire use, harsh environments, and rigorous field conditions, these rings deliver a secure optic hold you can rely on. Precision machining and thoughtful design help you get mounted correctly and into the field faster and easier. Secure Optic Lockdown: Provides a firm and stable hold to maintain a consistent zero.