Our Aluminum Nunchaku are for strength training. These nunchaku are made for a heavy upper body work out. Please note these are not suitable for any class or any type of martial arts competition. The weight makes them a great strength and training tool for the martial art nunchaku user. After a workout with these your normal nunchaku will feel like they are made of air. Each set weights in at 36 oz and you can alter the amount of chain links. They also come in two colors, clear coat and our new beautiful black oxide.