Features: Based on the video instruction, use the provided screws and nuts to install handrails and then you can use the ramp. Warm tips: Please bring your own wrench for drilling and installation. The handrails of threshold ramp can be disassembled and the front and rear wings of the slope can be folded, which is convenient for travel and other temporary scenarios to use. Specifications: Material: Steel Color: Silver Size: 40" L x 31.5" W x 24" H Package includes: Wheelchair ramp x 1 Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.