Those poles are better off in a museum.
Yeah, they have been around for quite a while and served pro Window Cleaners well for over 10 years - hell of lot stronger than converted fishing poles too!
Correction
Some suppliers have been handing out miss-leading advise with these poles now for over 10 years.
False economy, health hazard, the worst possible start to your wfp experience possible, clamps- crap, wear out in no time, H-E-A-V-Y!!!, bendy, absolute rubbish just to put it politlely. museum? even they would reject them!

tony