WILWOOD Hydraulic Handbrake Lever Assemblies

Provide a lightweight, high-leverage component for drift cars, drag race cars, rally cars, or any application where hand-actuation of one or more brake calipers is employed. Hand brakes can be configured as stand-alone circuits with dedicated reservoirs and auxiliary calipers, or set up as a pass-through system to operate brake calipers that are also actuated by the foot brake master cylinder.

http://www.wilwood.com/PDF/Flyers/fl451.pdf