Chrome plated swivel, made of alloy steel reduces friction. Forged yoke of heat-treated steel. Designed for double or single flare on copper, aluminum, mild steel brake line and brass tubing (up to 45°). Molded storage case included. Adapters included and available individually:. 3/16" adapter. 1/4" adapter. 5/16" adapter. 3/8" adapter. 1/2" adapter