Every chainsaw operator and felling professional should really own a wedge or even a variety of wedges because they are an essential item in the world of felling. This Husqvarna Felling Wedge is a 14 cm version that comes made from rigid polystyrene to make life easier.
Wedges are intended to aid the fall of a tree by 1, pointing it in the right direction and 2, lifting the tree up. Felling wedges are also handy as a prevention for saw pinching and stop the tree from leaning back on the chainsaw. If you want to work safe and efficiently then you can never have enough wedges.