Lucky Seven 3/16" Copper-Coated Brake Line Kit 25 ft with 20 Brass Fittings & Dual Flaring Tool, Corrosion-Resistant

Lucky Seven's 3/16" copper-coated brake line kit is a complete 25-foot brake and fuel line system with 20 brass fittings and a dual flaring tool for reliable, corrosion-resistant connections.

This kit bundles 25 feet of 3/16" copper-coated steel tubing, a set of 20 brass fittings (including four unions), a tube cutter and a combined single/double flaring tool so you can shape and join brake, fuel, or hydraulic lines without sourcing parts separately. It’s designed for hobbyists, home mechanics, and professional technicians who need corrosion-resistant tubing that’s easy to bend and flare for leak-free terminations.

How does the copper coating help in road salt and humid climates?

The copper coating provides an extra protective layer over steel, slowing down oxidation and helping the tubing resist rust in wet or salty conditions. This extends the service life of installed lines versus plain steel and improves visual inspection by reducing surface corrosion.

• Copper-coated steel resists moisture-related corrosion better than bare steel.
• Brass fittings are less prone to galvanic wear with copper-coated tubing.
• Visible surface finish makes leaks and damage easier to spot during inspection.

What fittings and tools are included, and how do they simplify installation?

The kit contains 20 brass fittings tailored for 3/16" tubing—16 inverted tube nuts and 4 unions—to cover common brake, fuel and hydraulic connections. Included tools—a tube cutter plus a combined single/double flaring tool—let you cut cleanly and form professional single or double flares for secure, leak-resistant joints.

• 16 inverted tube nuts for standard flare connections on 3/16" lines.
• 4 unions for joining line sections without adapters.
• Tube cutter makes straight, burr-minimized cuts for proper flaring.
• Dual flaring tool supports single and double flare to match vehicle requirements.

Is this tubing compatible with my vehicle’s braking or fuel system?

The 3/16" (approximately 4.8 mm) tubing size is commonly used for many automotive and light-truck brake, fuel and hydraulic runs. It’s suitable for repair, replacement or custom routing where 3/16" diameter lines are specified. Always compare with your vehicle’s OEM line diameter and fitting type before installation.

• Appropriate where OEM calls for 3/16" brake or fuel tubing.
• Works with soft metals like copper, aluminum, and brass when flaring.
• Not intended to replace larger-diameter main lines without verification.

How does the flaring tool support reliable, leak-free joints?

The included flaring tool creates precise single or double flares in soft metal tubing so the brass fittings seat evenly and seal tightly. Properly formed flares reduce the chance of leaks under pressure and provide strong mechanical joints that withstand vibration and thermal cycles.

• Double flares recommended where higher-pressure or OEM-style connections are required.
• Single flares useful for low-profile fittings and some fuel or transmission lines.
• Tool compatibility with copper, aluminum, brass, magnesium and soft steel tubing.

Who this product is for: This Lucky Seven kit is aimed at DIY mechanics, restoration hobbyists, and professionals who need a ready-packaged supply of corrosion-resistant 3/16" tubing plus fittings and tools for brake, fuel, or hydraulic jobs. If you’re retrofitting lines, repairing rusted runs, or fabricating custom plumbing for vehicles, small equipment, or industrial prototypes and you require a compact, corrosion-resistant solution with flaring capability, this kit delivers the core materials and hand tools to complete common installations.