ZJM.H15(13) bond head anchor is a kind of anchor that uses an onion jack to roll the end of the steel strand into a pear-shaped head. When it is necessary to transmit the post-tension to the concrete, the H-type anchor system can be used. It can be made into a square, rectangular and other arrangements as required. The pear-shaped self-anchor head is formed by the YHH onion jack.