This set allows you to create, up to a 180 degree turn in your ramp set up. The set comprises of 2x entry/exit blocks and 7x middle blocks. You can add or remove the middle blocks to make the berm set fit your layout.
These need to be held together with a wingnut bolt (supplied) between each joint to stop movement. This will allow you to really make use of the area you are using.
Say you were setting up in a tennis court. You could create 2 or 3 runs by turning the riders 180 degrees, or set the berms at 90 degrees to create a skill set up around the perimeter. Berm sets stack inside each other to reduce storage space.