These hammers are guaranteed for life against breakage. Improved design with a beautiful chamfer machined all the way around the outside and also inside the hole. Narrowed half-cock notch eliminates sear damage. Commander style spur finely serrated for positive gripping surface. Sides are narrowed to eliminate drag on slide. Lowered strut pin hole reduces full-cock spring pressure. Hammer hooks precisely machined at 020-.022 perfectly square with sharp corners ready for light final stoning.