DOUBLE FLARING TOOL SET INCLUDES: The comprehensive 7-piece set includes flaring bar, yoke, and 5 double flare dies for tubing sizes: 3/16 inch, 1/4 inch, 5/16 inch, 3/8 inch and 1/2 inch outer diameter. It also contains a storage case which keeps the parts organized and ready to use.. DESIGNED FOR: The double flaring tool kit has been designed to make double or single flares in copper, aluminum, and brass tubing as well as soft steel brake line tubing. SMOOTHER FUNCTION: This chrome-plated alloy steel swivel reduces friction. It also helps in the smooth functioning of flaring bars. DURABILITY: The Forged, heat-treated steel yoke of the double flaring tool kit has been used for long term performance and durability.