The Phoenix Systems MAXPRO-HD (Heavy Duty) reverse brake bleeding system allows technicians to efficiently perform one-person brake services, including ABS. It works by removing trapped air in a brake system, which naturally wants to rise. The air pushes up and out the master cylinder to create a firmer pedal. This increases braking power, responsiveness and reduces vehicle stopping time. The tool comes constructed from durable die-cast steel and aluminum and has a powdercoated finish that helps it clean easily. Its smoother action handle helps alleviate hand-stress and the tool comes with a two year manufacturer warranty.