Designed and built exclusively in the USA, the genuine AMP Research PowerStep™ seamlessly extends when any door is opened, giving a rock-solid, safe and convenient step up into your truck. When the doors close, it retracts just as smoothly, streamlining the vehicle profile with no loss of ground clearance. The original AMP Research PowerStep™ is proven to perform in severe driving conditions and is backed by a full 5-year/60,000 mile warranty.