STIHL HTA EXTENSION SHAFT – HTA 50 ‐ 50CM With the STIHL HTA 50 shaft extension, you can extend the range of your STIHL HTA 50 battery pole pruner by 50 cm. This makes it easier for domestic users to prune hard-to-reach spots, such as when cutting fruit trees, and means you can also cut very high branches in treetops. The shaft extension is made of lightweight and durable aluminium. It weighs only 465 g, so you can work effortlessly with your STIHL HTA 50.