10 Best Double Flare Tools 2026 in the United States

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 DPTOOL Brake Line Flaring Tool Kit is designed to handle a variety of brake line and tubing tasks, supporting multiple flare types including 45-degree single, double, and bubble flares. It works with common tubing sizes ranging from 3/16" to 3/8" and 4.75mm, covering steel, stainless steel, and soft metal tubes, making it versatile for automotive brake, fuel, and transmission lines. Its build quality is solid, thanks to high-quality steel that’s heat-treated for durability and resistance to damage.

Users appreciate its professional-level accuracy and the ability to make reliable flares that help prevent leaks, which is especially important for brake and hydraulic systems. While the tool requires a vise to operate, the detailed step-by-step process is straightforward enough for both DIY enthusiasts and mechanics, though beginners should be careful to properly deburr tubing and apply lubrication to avoid issues.

The tool weighs over 9 pounds and is somewhat bulky, which may affect portability if you need to carry it frequently. Additionally, the kit’s usefulness is limited to specified tubing sizes and flare types, so it might not fit specialized or uncommon tubing needs. If you want a dependable, multi-purpose brake line flaring tool that balances professional results with reasonable ease of use, this DPTOOL kit is a solid choice—just be prepared for the setup and handling steps it requires.

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.