5.5 inches long - sold singly. Genuine, high-density polyethene Windsor tree felling wedge - made in New Zealand. Specifically designed for use with the chainsaw - the Windsor Wedge is made of polyethene so it won't damage your saw chain if you happen to nick it with your saw. The use of a wedge helps direct the fall and stops your chainsaw bar getting pinched in the cut (if there is any sit-back with the chog of timber coming down). Unique 'teeth' on the wedge surface to help keep it in place.