The term THREE-SIDED BLADE refers to an epee, a type of fencing sword with a triangular cross-section blade. An epee is one of the three weapons used in modern Olympic fencing, along with the foil and sabre. It is the heaviest of the three weapons, and is designed to simulate the dueling sword of the 19th century. The epee is characterized by its large bell guard and a maximum length of 110 cm.