For use with DEWALT® dce450 copper swage tool to make expansions in refrigeration-type soft copper tubing. The DEWALT® DCE4500516 5/16" swage head features an automatic rotation for even expansions suitable for brazing in hvacr applications. Reduce instances of cracking in small diameter tubing with a patent-pending two-stage adjustable collar that allows for partial expansion in the first postion and a full expansion in the second position. Maximize durability with a steel body and nickel plate