The term 'Duel Tool' refers to the four weapons used in fencing: epee, SWORD, FOIL, and SABER. An epee is a type of SWORD with a triangular cross-section blade and a large bell guard, while a SWORD is a long-bladed weapon with a hilt and a curved blade. A FOIL is a light, flexible SWORD with a rectangular cross-section blade and a small bell guard, while a SABER is a curved, single-edged SWORD with a large bell guard. All four weapons are used in fencing competitions and duels.