The Apuri felling handle is designed to allow the operator to fell a tree with a straight back.The Apuri felling handle has an extendable handle structure for mounting onto chainsaws when felling energywood and other small diameter trees. It allows the operator to fell with a straight back and also permits the tree to be pushed in the desired direction while felling due to the left hand being free. It mounts onto the chainsaw with snap-on fasteners, making it easy to fit and remove. The Apuri is compatible with most chainsaw makes and models (Husqvarna, Stihl, Jonsered, Dolmar and Solo). It is made from steel tubing and has an electroplated zinc surfacing. The entire handle structure weighs only 2.6 kg.
Source: http://www.piksa.fi/apurituote/apurien.html