The Park Tool MWF3 is a custom-built wrench designed for compression nuts, nipples, and other fittings found on hydraulic brake systems.

The five-sided flare wrench head evenly distributes the force applied to the wrench, reducing the risk of damage to fasteners and brake hoses.

It has a slim, low-profile design to access low-clearance fittings found on hydraulic levers and calipers.

3/8" fittings allow for use with a torque wrench to achieve correct torque.