Mechanic Hand Tools & Torque Wrenches

Why is a Flare Nut Wrench (line wrench) preferred over an open-end wrench on automotive brake lines?

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 Correct IncorrectA flare nut wrench wraps around 5 of the 6 flats on relatively soft brake line tube nuts, preventing corner distortion and crushing.

Why is a Flare Nut Wrench (line wrench) preferred over an open-end wrench on automotive brake lines?

• It is made of soft rubber to cushion the pipe
• It has a built-in light for seeing under the car
• It grips five sides of soft hex fittings to prevent rounding under high breaking torque
• It automatically bleeds air from the brake caliper