Atwood's Surge Brake Actuators provide high quality fit and finish with a specially engineered design that creates more pressure at the brakes than typical in line actuator systems. Atwood's surge brake actuators have a lock-out feature that allows use with standard hydraulic brakes for backing up. This means no need for specific free-backing brakes. For added safety, the surge actuator's breakaway device will set the trailer brakes automatically should separation from the tow vehicle occur. This product is proudly designed, engineered, manufactured, and tested in the USA.