Hiraken Tsuki

In this strike the fingers are curled so that the fingertips rest on the pads of the fingers in the palm of the hand. The tops of the first bone in the fingers (proximal phalanges) remains in line with the back of the hand, but the middle and end bones of the fingers tuck under to form a very thin striking surface. The second joint of the fingers is now used as the striking surface (the proximal interphalangeal joint). The thumb is tucked in alongside the hand to minimize the chance that it will be injured by being pulled away upon contact with clothing or other parts of the opponent’s body.