2Pcs 6.3" Rise Rubber Curb Ramp Heavy Duty Loading Driveway Ramp Threshold Ramp 38.5 in L X 19.6 in W X 6.3 in H for Loading Dock, Warehouse, Motorcycles, Cars, TOOLS-00652X2. 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 26 degrees).