Arnis De Mano means "Armor of the Hand." It is a Native Filipino fighting style that employs the use of sticks or bladed weapons. During the Spanish conquest, the spanish feared the Filipino's ability to use this skill so they banned its practice outright. This skill was hidden in stageplays and dances, most notably the "Moro-moro" which is a play of the battles between the Christians and Muslims.

There are three main styles of Arnis, Solo Baston which uses a single stick, Sinawali which uses two sticks, and the Spanish techniques that uses one long and one short stick known as Espada Y Daga [Sword and dagger]

Here, Clint is using Sinawali, the stance he's in is during the fourth exchange of the planned spar Cinco Tirados [Five Strikes]