Capri Tools 3/16 in. Double Flaring Tool — Compact, Removable-Die 45° Flare

This compact, all-in-one flaring tool speeds up the process of creating professional double flares in non-stainless steel, nickel, and copper tubing. Designed for both on-vehicle work in tight spaces and bench-top use, the tool features a removable die for improved grip when clamped in a vise. Aside from a 10 mm and 17 mm wrench, no additional accessories are required to produce repeatable flares suitable for automotive and general plumbing tasks.

How does this tool reduce the time needed for double flares?

The CP21110-316’s modern geometry and integrated clamping reduce setup and execution time compared with older multi-piece flaring kits. Its single-body design aligns tube and punch more precisely, cutting the number of steps and chance for rework.

• Pre-aligned flaring head for faster setup
• Detachable die allows quick switch to bench vise work
• Compact size for easier handling in cramped areas
• Requires only a 10 mm and 17 mm wrench to operate

What tube types and sizes does it support?

This model is built specifically for 3/16 in. tubing and performs best with non-stainless steel, nickel, and copper lines. It is optimized for SAE 45° double flares commonly used on brake lines and many fuel-line connections.

• Built for 3/16 in. outer diameter tubing
• Suitable for copper, nickel, and non-stainless steel tubing
• Not intended for stainless steel or non-compatible alloys without caution
• Produces standard 45° SAE double flares for compatible fittings

Can I use the tool on a vehicle, and how portable is it?

The tool’s compact footprint was designed so you can flare lines both off and on the vehicle, even in tight wheel wells or engine bays. Its detachable die lets you move from mobile repairs to a bench vise when more leverage or stability is needed.

• Portable and compact for field repairs
• Detachable die for vise-mounted flaring when required
• Low-profile clamping works in narrow spaces
• All-in-one kit needs only two common wrenches

What tools or accessories are required to get started?

Capri Tools designed this flaring tool as a near-complete solution. Besides the flaring unit itself, you only need a 10 mm and a 17 mm wrench to secure the tube and operate the driver; a bench vise is optional when using the detachable die for extra stability.

• Includes the flaring tool and removable die—no extra adapters
• Only a 10 mm and a 17 mm wrench are required
• Optional bench vise for heavy-duty or bench-mounted work
• Recommended tube cutter and deburring tool for best results

Who is this for: The Capri Tools CP21110-316 double flaring tool is aimed at mechanics, home DIYers, and restoration enthusiasts who need quick, consistent 45° double flares on 3/16 in. brake, fuel, or hydraulic lines. It’s ideal for technicians who value portability and speed, plus hobbyists who want professional-grade results without a complex kit. If you often work in tight spaces or prefer a tool that adapts between vehicle-side repairs and bench work, this model delivers the balance of convenience and accuracy you need.