10 Best Double Flare Tools 2026 in the United States

The Mastercool 72480 Hydraulic Flaring Tool Kit is designed for creating precise 37° AN and double flares, making it highly suitable for aviation, motorsports, and high-performance automotive applications. One of its standout features is its compatibility with a range of materials including steel, light stainless steel, aluminum, and soft metals, which makes it versatile for various custom fabrication projects.

The included die set and adapters cover a range of tubing sizes, from 3/16” to 1/2”, providing flexibility for different tasks. The hydraulic hand-held pump system significantly reduces the manual effort required, ensuring accurate and consistent results, which is especially important for high-pressure fuel, oil, and brake lines.

Additionally, the kit comes in a custom-molded storage case, which enhances its portability and keeps the tools organized for easy access, making it ideal for both garage use and on-the-go repairs, like those needed by race teams and aviation repair shops. Potential users should be aware that the hydraulic system may require some initial familiarization if they are not used to such tools, and the kit's relatively high cost might be a consideration for those on a budget. Nevertheless, its durability and ease of use make it a reliable choice for professionals and serious hobbyists alike.

The SEEKSELF Professional Brake Line Flaring Tool Kit is designed to handle 45-degree single, double, and bubble flares on various metal tubes like steel and copper, making it a versatile choice for brake and plumbing work. It supports common tubing sizes from 3/16" up to 3/8", covering most small to mid-size brake line jobs. The tool is built from sturdy steel, which should hold up well over time, and the split dies have safety features to prevent slipping during use.

While it requires mounting on a vise for stable operation and is not meant to be used directly on a car, its long lever handle helps reduce effort, especially for right-handed users. The included instruction manual is a helpful guide for beginners. The kit is portable with a plastic case for storage and transport, but it is a bit heavy at nearly 9 pounds.

This kit suits amateurs and professionals who need a reliable, all-in-one flaring tool for brake lines and similar tubing. Users should take safety precautions and have a proper vise setup to use it effectively.

The Capri Tools 3/16 in. Double Flaring Tool is well-suited for automotive enthusiasts or DIYers working with brake lines. It's specifically designed to create high-quality 45-degree SAE double flares on 3/16-inch tubing, and it works effectively with non-stainless steel, nickel, and copper materials. This makes it a great choice for those working on standard brake lines but not suitable for stainless steel tubing.

The tool stands out with its compact and portable design, allowing users to work on or off the vehicle, even in tight spaces. This flexibility is enhanced by the detachable die, which can be used with a bench vise, adding to its versatility. The simplicity of the tool's operation, requiring just a 10 mm and a 17 mm wrench, emphasizes ease of use, making it accessible for users who may not have extensive toolkits.

Durability-wise, the tool is constructed with alloy steel, promising long-lasting performance, and it comes with a lifetime warranty, which is reassuring for long-term use. Its lightweight nature at only 12.8 ounces and compact dimensions further enhance portability, making it easy to store and transport.

In summary, the Capri Tools Double Flaring Tool is a reliable and practical option for those frequently working with 3/16-inch tubing in brake systems, offering portability and ease of use as its main advantages.