Uniweld 70006 Multi Swage 6-in-1 Punch for 3/16-Inch, 1/4-Inch, 5/16-Inch, 3/8-Inch, 1/2-Inch and 5/8-Inch OD Tubing,Uniweld,70006" /> 6-in-1 swage punch for 3/16in, 1/4in, 5/16in, 3/8in, 1/2in and 5/8in O.D Designed to enlarge one end of copper tubing to make a connection without a fitting Swaging method means one solder joint, not two, so it will take half the soldering or brazing time that fittings require