Here's the completed double flare on our 3/16 brake line. The bevel in the cone imparts a perfect 45-degree angle to the flare. The Great Neck flaring bar has openings and dies for steel lines in the diameters of 5/8-, 1/2-, 3/8-, 5/16-, 1/4-, and 3/16-inch. Flaring brake line tubing takes some practice, so practice on some scrap steel tubing before using the actual material going onto the car. If you need a more elaborate flaring tool for stainless steel line, EFI fittings, or modern metric bubble flares, check out the TLF04 hydraulic flair tool from Inline Tube.