The Leupold steel standard bases and rings are the most versatile of any mounting system we offer. The rear ring is secured by windage adjustment screws, allowing the scope's internal adjustments to be reserved for precise sight-in. Additionally, shims can be used for gross elevation adjustment, reserving the scope's elevation adjustment for bullet drop compensation dial applications. Leupold's steel Dual Dovetail bases and rings are one of our strongest mount systems, designed for large caliber rifles with high recoils. The twist-and-lock action of the rings ensures a strong connection with the one or two-piece base. Product Details Standard Twist-Lock Mounting System Set of Two-Piece Base & 1" Ring Pair Machined Steel Construction Reversible Front Base for Long Actions Fits Remington 700 Bolt-Action Rifles Matte Black Product Specifications U.S. Carbon Steel Bases Optimal tensile strength for guaranteed Strike-Forged Steel Rings 28% strength improvement Anti-Slip Ring Grooves No lapping required CNC Machined Bases and Rings For perfect alignment Locking Screws for Nylok Won't back out under recoil or vibration Torx Windage screws Won't strip or distort