This professional brake line flaring tool kit is designed to create precise 45° and 37° double and bubble flares for automotive line repair. It works with 3/16", 1/4", 5/16", and 3/8" copper, aluminum, and thin steel tubing. Built from hardened carbon steel, it delivers durable performance and consistent, leak-free results. The kit also includes essential accessories such as die heads, dies, a deburring tool, a tube cutter, a handle, a thread wrench, and a storage toolbox.