The Mastercool 70040 All-In-One Swaging Punch. Nickel-chrome finish. Swages 1/4", 5/16", 3/8", 1/2" and 5/8". Enlarge one end of copper tubing to accept piece of original size tubing, then solder together like a fitting. Tools are heat treated for durability.

Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov