YIYITOOLS 7-Piece Brake Line Flaring Kit — 3/16 in & 1/4 in Tubing, 45° Single/Double/Bubble Flares, Copper/Aluminum

The YIYITOOLS 7-piece brake line flaring kit creates precise 45° single, double and bubble flares for 3/16" and 1/4" copper, aluminum and nickel-copper tubing.

This compact workshop kit puts professional-style brake and hydraulic line flares within reach of DIY mechanics and technicians. Built to handle common SAE tubing sizes found on most vehicles, the set combines a low-profile flaring bar with a vise assembly and tooling that’s easy to use in confined spaces or mounted to a bench. It’s optimized for copper, aluminum and nickel-copper tubing and is not recommended for stainless steel.

How accurate are the flares this kit makes?

The kit is designed to produce repeatable 45° single, double and bubble flares with consistent geometry so fittings seal reliably. A built-in depth stop and a centered vise chuck help position each tube identically, reducing rework and leakage risk.

• Produces 45° single, double and bubble flares
• Depth stop for consistent tubing length
• Vise assembly centers tubing to avoid misalignment
• Works reliably on 3/16" and 1/4" SAE tubing

Can I use this under a vehicle or only on a bench?

The low-profile bar is specifically shaped to fit into tight spaces, making it possible to flare lines while the tubing remains on the car. When more clearance or stability is needed, the clamp-on vise assembly and included hardware let you secure the bar to a bench for a steadier setup.

• Low-profile design for under-vehicle work
• Bench-mountable vise for stationary operations
• Compact components that fit into cramped engine bays
• No specialized machinery required — just a 10 mm and 17 mm wrench

What tubing and fittings does this kit support?

Designed for common brake and hydraulic lines, the kit accepts 3/16" and 1/4" SAE tubing made from copper, aluminum and nickel-copper alloys. It is not built for stainless steel tubing, so avoid using it on that material to prevent tool damage or poor flares.

• Compatible sizes: 3/16" and 1/4"
• Supported materials: copper, aluminum, nickel-copper
• Not recommended for stainless steel tubing
• Includes adaptors and dies for the listed flare types

What comes in the box and what extra tools are needed?

The complete 7-piece kit includes the flaring bar, vise assembly, mandrels/dies for single, double and bubble flares, and associated hardware. Most jobs require only a common 10 mm and 17 mm wrench in addition to the pieces provided.

• 7-piece kit: bar, vise, dies/mandrels and hardware
• Creates single, double and bubble flares without extra addons
• Only a 10 mm and 17 mm wrench are needed externally
• Compact carrying size for mobile or shop use

Who is this for: The YIYITOOLS 7-piece brake line flaring kit is aimed at home mechanics, restoration enthusiasts and professional technicians who work on brake and hydraulic lines using copper, aluminum or nickel-copper tubing. If you need a portable, accurate flaring solution that performs in tight engine bays and doubles as a bench-mounted tool, this kit provides a practical, cost-effective option. Avoid using it on stainless steel lines and pair it with basic hand wrenches for immediate use.