For those who live and work in extreme environments, the regular PowerSteps will take massive beating and may not be able to stand both the test of time and harsh operating conditions, combined. Cue the PowerStep Xtreme Running Boards! The die-cast aluminum design, rigid treading, and textured black powder-coat offer extreme traction and the dual-motors provide the power and security needed to work in the harshest of conditions. That makes these the most rugged PowerSteps available from AMP Research! The PowerStep Xtreme are backed by a 5 Year/60,000 Mile Warranty and are engineered and manufactured in the USA!