This Kensight Elliason Rear Sight is a faithful modern-day recreation of the original Elliason Sight used on the legendary Colt Revolvers. The rear sight body is Wire-EDM machined from 4140 Chrome Moly Steel that is then heat treated to a hardness of RC 38-40, and features precise click-adjustments that allow for reliable, consistent point of impact changes. This Elliason rear sight is equipped with a square target blade that is fully serrated to reduce glare. This provides a crisp, uncluttered sight picture that helps a shooter to maintain focus on the front sight post. This sight is compatible with the new 2020 Colt revolvers that have the adjustable sight including the Colt Python, Colt Anaconda, and Colt King Cobra Target models. FeaturesClick AdjustmentBlade Notch: 0.118" x 0.098"Sight Body Dimensions: 1.582" x 0.728" x 0.315"