The ZF series offers telescoping units that extend to offer the longest reach! This update to the ZR series features are light, maneuverable poles that are perfectly balanced to provide accurate pruning at heights that would otherwise require a ladder. The blades are drop forged for extra strength and Marquench hardened for superior long lasting sharpness. The tilt case of the ZR series was eliminated for the ZF series and the inner rod is stronger. There is also a blind nut attached to the pole to secure the handle stop screw in place. The end result: Even Longer Life! (go ahead - we know you want to cheer!)