Force Factor VolcaNO in case you're doing a eastern martial art, you can make use of the makiwara, a device developed in antiquity for the purpose of reworking the karate-ka's arms from the smooth and sensitive hands of a mortal man and into the twisted and gnarled talons of the merciless killer.what is a makiwara.http://www.healthsupreviews.com/force-factor-volcano/