7Pcs Brake Line Flaring Kit for 1/4", 3/16" Copper, Aluminum and Nickel-Copper Tubing Lines, Creates 45° Single, Double & Bubble Flares, SAE This 7-piece brake line double flaring tool kit is designed to handle 3/16" and 1/4" SAE lines, working with copper, aluminum, and nickel-copper tubing.