The Elliason - Square Blade is a modern-day version of the ever-popular Elliason¿ sight used on the Colt® Gold Cup¿ for many years. We have combined our expertise in wire-EDM manufacturing with this classic design to produce a sight that is as durable as it is easy to use. Will also retrofit pistols and revolvers originally equipped with the Accro¿ sight such as the Colt® Gold Cup¿ Series 70 & Series 80, Pre- Series 70 National Match¿, Ace¿, .22LR Conversion Kit¿, Python¿, Anaconda¿, King Cobra¿, Trooper¿, Diamondback¿, Officer's Model Match¿, Woodsman¿ Target. Supplied complete with replacement hinge pin and springs. Specification: 4140 chrome-moly steel OA: 1.582" x 0.728" x 0.315" Blade Notch Dim: 0.118" x 0.098"