SILKY SAWS Zubat Telescopic 3.8m Pole
They have two locking systems, to assure structural rigidity of the extended poles. They have pins/buttons that lock each pole together. Then they have friction clamps which squeeze the poles together. This dual locking system allows 100% of the effort at the handle to be effectively transferred to the blade meters away. They also protect the other locking system from getting damaged.