Double Flaring Tool Kit Special design for double or single flare in copper, aluminum, soft steel brake line and brass tubing up to 45º. Includes five adapters 3/16, 1/4, 5/16, 3/8, and 1/2 (4.8mm through 12.7mm). Chrome swivel is made of alloy steel to reduce friction. Forged yoke is made of heat treated steel. Blow molded case for storage.