A favorite light

Here is one of my favorite lights:
mighty bright

Its a triple led book light that is great for almost any task.
The clip is very strong, the leds are bright and the telescoping neck makes it easy to position light over any work. Use two of them to light up a picnic table.

How durable is that telescoping arm? Seems like it would be the weak link in this light if the light were used a lot.