If you're growing outside in a windy area or for any reason want to make sure your drippers don't move, these stakes will help. And good for making the tubing stay where you want it when you're making big curves - they fit both the distribution drippers and the 8 mm tubing.
They're also really good if you're using Blumats in a very low pressure, gravity system. With these you can raise the drippers off the ground and help keep them from clogging.