To be fair Groundhog, the harris pole clamps are not the best in the world, and are a right cow when they lock up, but for £15 you can't complain 
Lock up? you must be limp wristed or something!! I have never had that problem, I honestly find them excellent clamps, easy and effective to use. The worst clamps I ever used was on the powerpole from omnipole, now they were horrible clamps!!
Limp wristed you cheeky git.

Omnipole clamps I agree they are far worse and as the pole is about 400 x the price I would say harris rocks.
But harris clamps have locked up a couple of time, but is on same pole so not sure if it is knackered or not
