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 LainKeen Professional Brake Tube Line Flaring Tool set is a versatile and precise tool for creating single, bubble, and double flares on various types of metal tubing, including steel, stainless steel, and soft metals like copper and aluminum. It accommodates tubing sizes ranging from 3/16 to 3/8 inches, making it suitable for a variety of automotive applications such as brake lines, transmission cooler lines, and fuel lines. The inclusion of both 37- and 45-degree flare options adds to its versatility.

One of the key strengths of this tool is its ease of use; it is designed to be mounted in a vise, and the T-handle screw clamp ensures the die and tubing remain securely in place for quick and easy flaring. This ensures that even users without extensive experience can achieve professional-grade flares. Durability is a strong point, as it is advertised as a professional kit, indicating robust construction. However, its requirement to be mounted in a vise may limit its portability for some users.

This tool is ideal for automotive enthusiasts and professionals who need a reliable and precise flaring tool for various automotive tubing jobs.