First time I used it with the extension it broke after 45 min. Worx rep was great and replaced it. Thereafter I never used the extension again and only occasionally used the chainsaw attachment. The chainsaw attachment now wiggles a bit and the chain no longer spins when attempting to cut. The saw spins without load but as soon as a limb cut is attempted the chain stops. Very frustrating. Everything is tightened down and not an abuse or user error issue. The base unit is a great grass trimmer but I do not recommend this pole saw attachment.