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The flaring cone in this kit fits six different outer diameters: 3/16", 1/4", 5/16", 3/8", 1/2", and 5/8". It covers a broad range of applications, including passenger cars, light trucks, transmission cooling lines, and HVAC refrigerant piping. Technicians who work in mixed-fleet service bays don't need to buy many single-purpose tools.
This kit comes with a 25-foot copper-coated steel brake line, with enough raw material to replace many underbody lines on compact and midsize cars without buying extra tubing. The copper coating protects the exterior from rust, and the steel substrate maintains the pressure rating required for the automotive hydraulic brake circuit to operate up to 1,500 PSI burst pressure.
The kit includes 20 threaded brake line fittings and 2 threaded unions. It gives you enough hardware to finish both ends of several line segments and make mid-run splice joints where replacing the whole line isn't possible. Union joints allow technicians to repair localized corrosion by cutting out the damaged section and reconnecting the existing line lengths.
The flaring bar in the middle of this brake line flaring tool kit is made of hardened carbon steel. This material was chosen because it withstands the compressive clamping forces applied during repeated flaring operations without causing bore distortion or jaw misalignment over time. The shape of the tube bore in the flaring bar directly affects the flare's symmetry.
When used with a lot of force, hardened tools last much longer than non-hardened tools, which wear more quickly under repeated use. Professional technicians who do a lot of brake line work, such as fleet maintenance shops, restoration specialists, and mobile repair operators, can use a tool that maintains the same size and shape across hundreds of flaring operations without recalibrating or replacing the jaws, which would take more time and money.
The included 3-in-1 tube bender in this brake line flaring tool kit means you don't have to buy a separate bending tool. It can bend the three most common tube diameters used in underbody brake line repair: 1/4", 5/16", and 3/8" outer diameters. A single bender body can handle all three sizes because it has special forming grooves, each rounded to an appropriate bend radius for its tube diameter.
The bend range of 0° to 180° gives technicians complete geometric freedom to replicate complex factory routing paths that go around frame rails, suspension components, and fuel tank mounting brackets. Kink-free bends maintain the full internal bore diameter, allowing hydraulic fluid to flow freely and helping preserve line integrity.
Scribed alignment marks marked on the flaring bar surface let technicians set the tube insertion depth correctly before clamping. It eliminates the trial-and-error tube repositioning that leads to inconsistent flare heights in unmarked tool designs. The height of the flare directly affects how deep the fitting is. If there isn't enough material, the flares will be too shallow and will pull through under hydraulic pressure.
When working with copper-coated steel tubing, which is less malleable than pure copper if the forming cone is advanced beyond the optimal depth range, the flare depth must be properly set for the tube size. The top handle on the flaring cone gives you more control over the downward motion of the forming strokes.
This brake line flaring tool kit includes a tube cutter that ensures the ends of the brake lines are cut square and free of burrs before flaring. Cuts made with a hacksaw and an abrasive cutoff wheel leave angled end faces and internal burrs that change the shape of the flare cone contact surface during forming, making leak paths that can't be seen with the naked eye.
The cutter's rolling blade design scores and cleanly breaks the tube wall, leaving no metal chips behind. If a piece of metal gets into the hydraulic circuit during assembly, it could contaminate the brake fluid. The flaring cone can work with copper, aluminum, and thin-wall steel tubing, which is the same range of materials as the cutter and flaring components.
This tool kit includes eight parts that make up a repair kit. It means you don't have to buy many specialized tools for a single brake line repair. The kit includes a 25FT copper-coated brake line, 20 fittings, 2 unions, a flaring bar, a flaring cone, a 3-in-1 tube bender, a tube cutter, and a 45° single-flare cone insert.
The kit can be used for more than just fixing brakes on one car because it works with brake circuits, transmission oil-cooling lines, power steering hydraulic lines, and residential HVAC refrigerant tubing with an outer diameter of 3/16" to 5/8". Technicians who buy this kit improve tool value over single-use tools because the same parts can be used for repairs across different vehicle systems and non-automotive tubing applications.