Precisely stone hammers and sears for most semi-autos on the market. This Series 2 stoning fixture is designed to alter the angle of the engagement surfaces that have inside angles or an extension of the sear above the engagement surface of the sear face. With the Universal Hammer Adapter (sold separately) it is possible to work on 20 different popular hammer designs. Other adapters are available for individual models.Pictured with the Series 2 Stoning Fixture are the Universal Stoning Fixture Adapter (158-637), the Power Custom Stoning Kit (918-073) and Ed Brown 1911 Commander-Style Match Hammer (732-850) for illustration purposes and are not included.