JKD Jungle Bolo Knives. Beautiful Jeet Kune Do Wall Deco with JKD Logo and Bruce Lee image. Comes with 2 Jungle Bolo Knives. You can add more JKD Knives and daggers to your collection. Great for Dojos or Martial Arts rooms. No poses. Made for my Jeet Kune Do Kwoon room. Try it before you buy! Please Leave Reviews Below And Concerns On My Page. "Osu no Seishin". Bolos are also used as military weapons and as such they were a particular favorite of the Filipino resistance during the 1898 Philippine Revolution against Spain, the Philippine-American War, and the Commonwealth period. Since the bolo was first used as a farming implement, it was used in combat because during colonial times the ubiquitous bolo was readily available to the common person. For this reason the study of the bolo is common in Filipino martial arts, such as Balintawak Eskrima, Pekiti-Tirsia Kali and Modern Arnis.