Talley 30mm Screw Lock Detachable Ring Ex-High Color Case Hardened Color Case. The interlocking design provides a super strong lateral clamping force. This prevents any movement or play between the rings. The ring's clamping surface is just slightly above the top of the rail to allow for any necessary shims to get your scope perfectly aligned. Each ring has a dual stainless steel locking bar which ensures the integrity of the rings grip. This provides for any necessary clamping surface realignment that may occur between the ring and the rail. These new ring's higher clamping surface also allows for any necessary clamping surface realignment without having to re-zero the entire time. You will only have to hand tighten these teeth in order to achieve a precise fit. Lightly sprayed with a Manganese Phosphate finish these ring's are corrosion resistant durable and withstands gun cleaning solvents. If you are looking for a quality steel scope ring these are the ones for you. Specifications for Talley 30mm Screw Lock Detachable Ring Ex-High Color Case Hardened: Manufacturer: Talley Finish: Matte Ring Height: 0.6 in Tube Diameter: 30 mm Ring Quantity: Pair Fabric/Material: Chromoly Steel Weight: 4 oz Country of Origin: USA Package Contents: Talley 30mm Screw Lock Detachable Ring Ex-High Color Case Hardened Talley CCH400006: 30mm Screw Lock Detachable Ring Ex-High Color Case Hardened Color Case