Park Tool MWF-3 Metric Flare Wrench. A purpose-built wrench designed for compression nuts nipples and other fittings found on hydraulic brake systems. The five-sided flare wrench head evenly spreads out the force being applied to the wrench reducing the risk of damage to fasteners and brake hoses. Features a slim low-profile design to access low-clearance fittings found on hydraulic levers and calipers. Built-in 3/8" fittings allow for use with a torque wrench to achieve proper torque. Double-sided wrench features 7mm and 8mm wrench openings Dimensions: 4" x 0.75" x 0.15" (101 mm x 19.5 mm x 4.5 mm)Weight: 44 g (1.55 oz.)NOTE: When using with a torque wrench the MWF-3 should be installed at a 90° angle from the beam of the wrench