DOUBLE DESIGN: No need to use with another step ramp, simply unfold, put in place, and it's ready to use! ANTI-SLIP SURFACE: The aluminium ramp prevents wheels from rolling and slipping, with a high-rise rail on both sides for extra safety and precaution. Non-slip surface on the top to prevent wheels from moving when up. MADE FROM ALUMINIUM ALLOY: Anti-corrosive, strong and durable, the portable ramp provides extensive use both indoors and outdoors. FOLDABLE: With handle and lock and chain, it allows you to carry it easily from place to place.