The Hurst Roll Control (R) Line Lock is primarily used in drag racing to provide positive locking action to the front wheels of race cars, reducing the change of "Rolling the Lights" and producing more effective "Burn Outs" for heating up the tires (See Picture Below). Rigorous testing has provided a 1/100,000 of a second release time and vibration tests have seen up to 30 G's applied without mechanical failure. On the street or off-road, and as a temporary "Hill Holder," Roll/Control finds used when both the clutch and brake are needed at the same time. With the on/off button at the control of the driver's fingertip, release of the locked wheels is easy. The Hurst Roll/Control is adapatable to most domestic and import hydraulic brake systems.