1Pcs 5.7" Rise Rubber Curb Ramp Heavy Duty Loading Driveway Ramp Threshold Ramp 38.6" L X 14.8" W X 5.7" H for Loading Dock, Warehouse, Motorcycles, Cars, TOOLS-00647. EASY INSTALLATION - DNA Curb Ramp adopts an integrated design and Equipped with 1 x 2pre-drilled mounting holes that can be connected to the ground with screws(note: The slope is 30 degrees).