These DVD's were edited from gunsmith training course materials and were orginally available only as companion videos for the Kuhnhausen Colt .45 Auto, S&W Revolver, and Volume I Colt D.A. Revolver Shop Manuals.Although these DVD's are still suggested for that purpose, because they add extra chapters to their corresponding manuals, all three programs stand by themselves and provide additional practical gunsmithing information.FeaturesGunsmithing the Colt .45 Automatic (and M1911-M1911A1 copies) Gunsmithing the S&W J, K, L, & N Frame Revolvers (non powdered metal part revolvers manufactured through mid 1999) Gunsmithing the Colt D, E, & I Frame Series Revolvers (Python, Official police, Det. Special, Agent, Diamondback, etc.)