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

DPTOOL's Brake Line Flaring Tool Kit is a bench-mounted kit that produces accurate 45° single, double and bubble flares on steel and stainless brake, fuel and cooler lines.

This professional flaring kit gives DIYers and mechanics the hardware needed to form leak-resistant flares on common tubing sizes. The set is designed for use in a vise and includes a rotating 45° die head, split dies for five sizes, reaming cones and a cutter, all organized in a portable plastic case. Built from heat-treated steel and finished for corrosion resistance, the kit prioritizes repeatable precision so you can finish tight-sealing connections quickly.

How does the DPTOOL kit create different flare types?

The rotating die head and stepped reaming cones let you form single, bubble and double flares by following a sequence of operations. You choose the flat-face die for the tube, clamp in a vise, then use OP.0, OP.1 and OP.2 positions in order to shape the metal into the required profile.

• Single flare: set die head to OP.0 then OP.2.
• Bubble flare: set die head to OP.0 then OP.1.
• Double flare: sequence OP.0, then OP.1, then OP.2.

Which tubing sizes and applications are supported?

The kit accepts 3/16" (4.75mm), 1/4" (6.35mm), 5/16" (8mm) and 3/8" (9.5mm) tubing for repairs and fabrication. It works with steel, 304 stainless and softer metals used in automotive brake lines, fuel lines and transmission cooler lines.

• Common automotive brake and fuel line diameters included.
• Compatible with transmission cooler and hydraulic tubing.
• Die blocks and cones sized for standard metric and imperial tubes.

What makes this tool durable and accurate?

Key components are heat-treated and oxidized to resist wear and maintain clamping accuracy over many cycles. The split-die clamping system and precision-machined reaming cones produce consistent flares that reduce the risk of leaks when correctly installed.

• Heat-treated steel construction for long life.
• Precision dies for repeatable flare geometry.
• Vise-mounted design keeps the tool stable during forming.

How do I get clean, service-ready flares every time?

Preparation and technique matter: deburr tubing ends, use light anti-seize on the cut face, and lubricate the reaming cones. Work on a bench-mounted vise, align the die faces precisely and follow the OP.0/OP.1/OP.2 sequencing recommended for each flare type.

• Deburr inside and outside to remove metal shards.
• Apply anti-seize and light oil on cones for smoother forming.
• Use correct fittings with the flared face outward to test sealing.

Who this kit is for: DPTOOL's flaring tool kit is aimed at home mechanics, restoration shops and professional technicians who need a compact bench solution for brake, fuel and cooler line work. If you value repeatable, service-grade flares across common tubing sizes and prefer a portable, complete set with cutter and case, this kit provides the hardware and workflow to produce reliable connections in a garage or workshop setting.