Product DetailsCT95 5 in 1 Swaging Punch Tool for OD Soft Copper Tubing.Tubing Sizes: 1/4", 5/16", 3/8", 1/2" and 5/8" O.D. soft refrigeration copper piping.Swage joints take the place of fitting couplings which reduces soldering joints and saves money.HVAC service tech specialty hand tools for joining refrigeration copper tubing together.