Flaring is a bit more involved, and a suitable flaring tool is a must. There are basically two kinds of flares—the single flare and the double flare.

The only downside is the tool needs to be mounted in a vice, so you can't use it on the vehicle. Still it will do double flares and bubble flares in a bunch of common sized brake line sizes.

BANCHEE Auto Repair Double Flaring Tool,Single and Double Tool kit for Copper Pipe HVAC Card Sleeve Expansion, with Additional Scraper Tool, 45 Degrees（BC-2033B） BANCHEE 2 ratings ...

With that and the Summit Racing Professional Flaring Tool (PN: SUM-900314, $219.99 each) mounted in our bench vice, we can get to flaring. Put the flare nut on the tube.

The double-flaring tool is a different story. Many tool supply stores handle flaring tools, but in most cases these tools are only capable of producing a single flare.

Making your own brake lines might sound scary, but with this tool, it's a breeze. Add a flaring tool to your arsenal to take your DIY skills to the next level.

Weighing less than 3 pounds, this product provides fast, accurate automatic flaring. The cordless solution offers easy flare connectivity and can create flares in five sizes ranging from ¼-inch to ...

The 71700 kit comes in a custom-molded carrying case which includes dies and adapters for flaring and swaging copper tubing sizes of 1⁄4, 5⁄16, 3⁄8, 1⁄2, 5⁄8, 3⁄4, and 7⁄8 inch. Mastercool Inc.