I'm looking to extend a window pole by fastening another to it. T The fastening I seek could just be a tube which fits over the end of one pole and is glued or pinned. The next pole then slips in the tube and held in by friction. You dismantle by pulling them apart. Or it could be more complicated a bit like the fittings on drain rods. or even the extensions on snooker cues.
However I don't know what they are called or where to buy them.
All help appreciated.
parts