DPTOOL Brake Line Flaring Tool Kit — Bench-Mount 45° Single, Double & Bubble Flares, Heat-Treated Steel

DPTOOL's bench-mounted brake line flaring kit produces precise 45° single, double and bubble flares on steel, stainless and soft metal tubing for leak-resistant hydraulic and brake connections.

This comprehensive flaring kit is made for mechanics and experienced DIYers who need accurate, repeatable flares on brake, fuel and transmission cooler lines. Built from heat-treated steel with an oxidized finish, the tool set clamps in a vise and uses a rotating die head plus reaming cones to form single, double and bubble flares in common tube sizes. The kit arrives in a portable case and includes cutters, four split dies and clear instructions so you can complete professional-quality work on the bench.

How do I make single, double and bubble flares with this kit?

The rotating die head and three reaming cones (OP.0, OP.1, OP.2) let you sequence operations for different flare types. Rotate and position the die head, seat the tube in the split die, then press each cone in turn to form the desired profile.

• Single flare: align die head to OP.0 then OP.2 and press to form a 45° face.
• Bubble flare: use OP.0 then OP.1 to create a rounded bubble profile.
• Double flare: sequence OP.0, OP.1, then OP.2 to fold and finish a factory-style double flare.

Which tube sizes and materials are supported?

This DPTOOL kit handles the standard automotive tubing diameters and common materials used in brake and fuel systems. The split dies and cutter match metric and imperial sizes for broad compatibility.

• Included split dies for 3/16" (4.75 mm), 1/4" (6.35 mm), 5/16" (8 mm) and 3/8" (9.5 mm).
• Works on 304 stainless steel, mild steel and softer metal tubing.
• Suitable for brake lines, fuel lines and transmission cooler lines when used on a bench vise.

What features make this tool reliable and durable?

DPTOOL designed the tool body and dies for longevity and accuracy. Heat treatment and an oxidized finish increase hardness and wear resistance while precision machining keeps flares concentric and leak-free when assembled correctly.

• High-strength, heat-treated steel construction for long service life.
• Oxidized surface treatment to resist corrosion and galling.
• Precision-milled die faces and cones for repeatable flare geometry.

What preparation and technique tips improve results?

Simple prep steps reduce burrs, metal shavings and binding during forming. A clean cut, light anti-seize and mild lubrication on reamers help produce consistent, leak-resistant flares.

• Deburr both inside and outside of cut tubing before flaring.
• Apply a small amount of anti-seize to the tube end and light oil on OP.1/OP.2 cones.
• Always clamp the tool body securely in a vise and tighten tube clamps to prevent movement.

Who this kit is for: The DPTOOL 45° flaring kit is aimed at professional technicians, home mechanics and advanced DIY installers who need a bench-mounted solution for producing single, double and bubble flares in brake, fuel and transmission lines. If you require accurate, repeatable flares on steel or stainless tubing and have a vise for mounting, this kit provides the dies, cutter and guidance to finish jobs with workshop-grade results.