Tri-fold Portable Ramp Design The unique tri-fold portable ramp design of the Suitcase Trifold AS Ramp makes it easy to set up and easy to transport from place to place. This tri-fold portable ramp can separate into two easy-to-carry sections. Slip-Resistant Portable Ramp Surface The Suitcase Trifold AS Ramp offers an applied slip-resistant surface. Interlocking Hinge When operating the Suitcase Trifold AS Ramp, take notice of the interlocking hinge, designed for smoother operation and reduced pinch points. Self-Adjusting Bottom Transition Plate The Suitcase Trifold AS Ramp also features self-adjusting bottom transition plates, which adjusts the tri-fold portable ramp to most surfaces, making the Suitcase Trifold AS Ramp one of the safest portable ramps on the market. The Trifold AS Ramp is also compatible with the Top Lip Extension (TLE).