Tailored Fit: Specifically machined for pre-64 Winchester Model 70 magnum receivers featuring a .440-inch rear hole spacing.Premium Steel Construction: CNC-machined from high-strength steel to provide a rock-solid, inflexible foundation for hunting or long-range optics.Low-Profile Profile: Offers a 0 MOA elevation setup that lets your scope sit as low to the receiver as possible.Finish: Features a durable matte black finish to prevent rust and glare.