Corner ramp kits provide access from every direction. They have no edges to trip over and can be driven on by vehicles. If you need a corner from one direction one kit would suffice and if you need corners from left and right direction you would require two. For example, if you need a corner kit 2 from both sides you would need two of these and the Ramp Kit 2. They are available in 5 different height ranges, 2 widths and a choice of 3 surfaces.