The Ed Brown 1911 .40 Slide Stop is designed and built to exacting standards by one of the finest manufacturers of 1911 pistols and parts in the country. Fully machined from a forging for the ultimate in strength and longevity. Heat treated to perfect hardness for lifetime performance. Features serrated lever, .200 diameter pin, and a built in detent for easy installation. The Ed Brown 1911 .40 Slide Stop will drop in to nearly any 1911 pistol without hand-fitting and is guaranteed for life.