Flexzion DIN/ISO Bubble Flare Brake Line Flaring Tool Kit — Metric 4.75/6/8/10mm Dies, Heat-Treated Steel, Case

Flexzion's DIN/ISO Bubble Flare Brake Line Flaring Tool Kit builds professional-quality European-style bubble flares on copper, brass, aluminum, and mild steel tubing quickly and reliably.

This hydraulic-style flaring kit is made for technicians and home mechanics who need consistent, leak-resistant flares for hydraulic and brake lines. The set includes four metric dies—4.75mm (CNF-3), 6mm (CNF-4), 8mm and 10mm—so you can service a wide range of vehicles without searching for extra adapters. All parts store neatly in a blow-molded case, making the kit portable and organized for garage, shop, or roadside use.

How does the Flexzion kit create DIN/ISO bubble flares accurately?

The tool uses precisely machined dies and a robust flaring bar to form the bubble flare shape that meets DIN/ISO (European) specifications. Heat-treated steel components keep alignment stable under pressure so each flare is uniform and concentric.

• Machined metric dies for 4.75, 6, 8 and 10mm tubing
• Heat-treated flaring bar for consistent alignment
• Single-motion hydraulic-style operation for repeatability
• Works on copper, brass, aluminum, mild steel tubing

Which tubing sizes and materials are supported by this flaring set?

Included dies cover the most common metric brake and hydraulic tubing sizes used in European vehicles and many American models. The tool is compatible with soft metals typically used for brake and fuel lines.

• 4.75mm (CNF-3) for older European systems
• 6mm (CNF-4), 8mm, 10mm for modern brake and hydraulic lines
• Suitable for copper, brass, aluminum, and mild steel tubing
• Adapter selection eliminates need for separate tooling per size

What features improve safety and durability while flaring brake lines?

Durability and proper flare geometry are essential for secure, leak-free brake and hydraulic fittings. Flexzion prioritizes long-lasting materials and a design that clamps tubing rigidly to prevent slipping or misalignment during forming.

• Heat-treated steel construction for longevity
• Positive tube clamping reduces deformation and leaks
• Precision dies form correct seat angle and lip for fittings
• Sturdy case protects components and keeps parts clean

How portable and user-friendly is the kit for mobile repairs?

The complete kit ships in a compact blow-molded storage case that organizes dies, the gauge/wrench, and the flaring tool for quick access. The set is designed to get you from setup to a finished flare with minimal adjustments.

• Blow-molded case for transport and storage
• Gauge/wrench included for sizing and adjustments
• Straightforward setup, helpful for DIY and pros
• All parts stay secured to prevent loss on job sites

Who this is for: The Flexzion DIN/ISO Bubble Flare Brake Line Flaring Tool Kit is aimed at automotive technicians, restoration hobbyists, and anyone who services European-style brake and hydraulic systems. If you work with metric brake tubing or want one portable kit that covers common sizes and materials, this set provides the dies, clamping precision, and durable build to produce consistent, service-ready bubble flares.