2 poles for the price of 1
I bought these along with the last of the 2.2m poles on sale and didn't realise you get 2 in each pack. So that turned out pretty good for me!
Only managed to use these once but can confirm that they work well either with the spikes through tarp eyelets or as the spikes into the ground and using tension under a tarp to a solve an area where water might pool.
The only thing I'd say is I'm not sure if at full extension of 1.8m they'd stand up to too much sideways movement at the joint. But a little lower than that at 1.7 or 1.6 and they're rock solid.