This is the third hand you've been looking for when peening or swaging 1911 Auto frame rails. All-steel tool holds a single or double Slide Fitting Bar securely in place, without movement. Makes striking our Rail Swaging Punches with a hammer easier and more accurate. Designed by William A. Smith III of Marietta, Georgia. Must be used with current production Slide Fitting Bars equipped with through holes. Mfg: Brownells SPECS: Steel, blued. 2.6" (6.6cm) wide. Includes two, 1/4"-28 Allen screws and washers.