Designed to make double or single flares in copper, aluminum, and brass tubing as well as soft steel brake line tubing Chrome plated alloy steel swivel reduces friction and helps ensure a smooth, even flare Comprehensive set includes five adapters - 3/16, 1/4, 5/16, 3/8, and 1/2 inch (4.8, 6.4, 7.9, 9.5, and 12.7 mm) Forged, heat-treated steel yoke for long term performance and durability Rugged blow molded plastic storage case keeps tools contained and organized so they are ready when you need them