Jung Bong Il Hyung - (First Middle Pole Form) The Jung Bong, or Middle Staff, is the most commonly seen staff used in Kuk Sool Won™ and should measure in height between the student's eyebrows and the top of the head. Primarily used as a single-ended weapon, the Jung Bong is used in a variety of different motions (striking, spinning, blocking, poking, pressing, etc.), all of which are used in this first form.