Aluminium Wedge - 10" / 25cm / 1000g. A re-groundable wedge with barb surface on one side that prevents the wedge to go back. - Wedges help the tree fall in the direction of the notch cut by actually lifting the tree in that direction. - Used to prevent the tree from pinching the saw, or leaning back on the saw. - This Aluminium wedge can also be used for splitting logs.