Capri Tools 3/16 in Dual-Head Flaring Tool — ISO/DIN Bubble & 45° SAE Double, Compact for Engine Bays

This compact, portable flaring tool combines two flare styles in a single unit so you can form reliable brake-line flares and fuel-line connections without swapping tools. Designed for 3/16 in. (4.75 mm) non-stainless steel, nickel, and copper tubing, the tool’s single die produces ISO/DIN bubble flares, SAE double flares, and SAE bubble flares. A removable die allows bench-vise use, while the low-profile body fits tight engine- bay locations for on-vehicle work.

How does this tool save time compared with older flaring tools?

By integrating both an ISO/DIN bubble-flare head and a 45° SAE double-flare head into one device, you avoid changing attachments or carrying multiple tools. Its efficient clamp and mandrel action shortens setup and flare cycles.

• Dual-head design reduces tool swaps.
• Single die handles three flare types.
• Fast clamping action speeds each operation.
• Compact body cuts setup time in tight spaces.

Which tubing types and sizes are compatible with this tool?

The tool is engineered specifically for 3/16 in. (4.75 mm) tubing and works reliably with common soft metals used on brake and fuel systems. It is not intended for hardened stainless tubing without prior material-specific verification.

• Fits 3/16 in. (4.75 mm) tubing precisely.
• Works with non-stainless steel, nickel, and copper tubing.
• Single die produces ISO/DIN bubble and SAE double/bubble flares.
• Not recommended for unusually thick or hardened stainless without testing.

Can I use this tool on-vehicle and on a bench? What additional tools are required?

Yes — the tool’s compact profile lets you form flares while the tubing remains installed, and the die detaches so you can secure it in a bench vise for greater leverage or precision. You only need two common wrenches to operate it.

• Compact form fits engine compartments and tight panels.
• Detachable die enables bench-vise mounting for stability.
• Only a 10 mm and a 17 mm wrench are required for setup and operation.
• Lightweight and portable for field or garage use.

What kind of flares does the single die create and why does that matter?

The included die is versatile: it forms ISO/DIN bubble flares commonly used in metric fittings and 45° SAE double flares often required in domestic brake systems. That versatility helps technicians adapt to different standards without extra dies.

• Produces ISO/DIN bubble flares for metric connections.
• Forms 45° SAE double flares for traditional brake fittings.
• Also capable of SAE bubble flare where needed.
• One die reduces parts and simplifies inventory.

Who is this for? Mechanics, automotive technicians, bicycle or small-engine repair professionals, and DIYers who work with 3/16 in. metal tubing will benefit from this tool. It’s best suited for anyone who needs reliable bubble and double flares in confined locations or wants a single, portable flaring solution that handles common brake and fuel-line metals. Avoid use on unfamiliar hardened stainless tubing without confirmation of material compatibility.