BoyntonStu wrote:
How to couple two poles to make a quick extension pole? (wood, metal,
or plastic)

Problem: Couple/join 2-3/4" dia 5' long poles to make a 10' extension
pole that will not twist slip but which may easily pull apart?


Fewest parts, easy and inexpensive to manufacture.

There's a reason that poles usually telescope.

If I absolutely had to daisy-chain the poles,
I'd look at using Dinse welding cable connectors
to mechanically hold the lengths together.
They are nice, tight twist-lock connectors and
the price is entirely reasonable for what you get.