Material: Aluminum Alloy ( Light-weighted Durable ) Max Load Support: 510 Pounds Function: Doorstep, Safety Hammer Feature: Foldable, easy to store and carry Big enough to fit for all sizes of feet Non-slip design Easy Access to Car Rooftop Roof-rack, Easily in fixing or fetching Bike, Surf board, or other Bulky Travel Items on car roof top/ rack . Safety Hammer Design, In case of emergency you can use our safety hammer to break through the glass to escape Note: 1. Before use, Please put on the adhesive around the edge of doorstep so as to avoid scratching painting on your car. 2.Under industrial regulation, the slam door latch must withstand force of 2500 pounds at least, please be free of worry about damage on the latch while you step on the doorstep. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.