DPTOOL Brake Line Flaring Tool Kit — 37° & 45° Bench-Mount, Interchangeable Dies for Steel & Stainless Tubing

This professional flaring kit is engineered for accurate, repeatable tube-end flares used on automotive brake lines, transmission cooler lines and other hydraulic tubing. Built from hardened, heat-treated steel with interchangeable die heads and split dies, the set mounts in a vise and gives DIYers and mechanics the tools to form clean flares across common tube diameters quickly.

What types of flares can I make with this kit?

The DPTOOL kit supports three common flare types: single, double and bubble flares. You choose the flare by rotating to the appropriate die positions (OP.0, OP.1, OP.2) and using the correct cones and split dies for the tube size.

• Single flare: rotate die head to OP.0 then OP.2.
• Bubble flare: rotate die head to OP.0 then OP.1.
• Double flare: sequence OP.0 → OP.1 → OP.2.
• Works for 37° and 45° flare standards using the two rotating die heads supplied.

Which tube sizes and materials are compatible?

This flaring tool accepts a range of common tube diameters and handles both soft and harder tubing such as steel and 304 stainless. The split dies cover imperial and metric sizes used in automotive systems.

• 45° split dies: 3/16" (4.75mm), 1/4" (6.35mm), 5/16" (8mm), 3/8" (9.5mm), 6mm.
• 37° split dies: 3/16" (4.75mm), 1/4" (6.35mm), 5/16" (8mm), 3/8" (9.5mm).
• Suitable for brake lines, fuel lines, transmission cooler lines and other hydraulic tubing.
• Requires a bench vise for secure clamping during flaring operations.

How do I set up and use the tool to get consistent results?

Start by mounting the tool body in a vise and choosing the flat-face split die for your tube size. Clamp the tube firmly, use the appropriate reaming cone and cone sequence, and rotate the die heads as instructed to form the targeted flare shape.

• Deburr tube inside and outside before flaring to remove shavings.
• Apply a small amount of anti-seize to the tube end and light oil to the cones for smoother forming.
• Follow OP.0, OP.1, OP.2 sequencing for the desired flare type and repeat as needed for double flares.
• Always verify the flare seating with the intended fitting after forming.

What comes in the kit and how durable is it?

The kit includes everything needed to complete 37° and 45° flares across multiple sizes plus a carrying case. Components are heat-treated and oxidized for durability and stability under repeated shop use.

• Vise-mounted tool body, 37° and 45° rotating die heads, lever handle.
• Five 45° split dies and four 37° split dies to cover common sizes.
• Replacement drill bit for the 37° head, plastic carry case, and instruction manual.
• Heat-treated steel construction for long service life in a workshop setting.

Who this tool is for: The DPTOOL Brake Line Flaring Tool Kit is aimed at home mechanics, automotive technicians and hobbyists who need a bench-mounted flaring solution for brake, fuel and hydraulic tubing. If you work on older vehicles, perform brake line repairs, or build custom plumbing for transmissions or fuel systems and want consistent 37° and 45° flares without resorting to single-use fittings, this kit gives the parts, die options and durability required for reliable shop-level results.