The RETRAC HighRise Folding Rear Entry Step, No. 409924, is ideal for semi trailers, box trucks, and flat decks. It provides safer, easier access to the rear cargo area, featuring grated steel, high-traction treads. It's easily installed with four bolts and can be attached onto virtually any 4" bumper beam and has an auto-stowing design to prevent the step from being damaged when backing up. The unit is constructed from high-strength 7-gauge steel and has a work load limit of 600 lbs. It ergonomic design reduces strain and promotes worker health and wellness.