It’s a kind of jack with front holding head and through tangent style. It ‘s used for YM15 /YM13 series anchorages, pulling bonded or unbounded single strand wire, also used for multiple holes anchorage. Inside the jack, there is a devise which can prevent strands from turning around during tension. Pulling and pressing are both available for self locked or anchor. When the working tasks required a pressing to anchor, the compressor shall be added on the top of jack and a FL diverter valve shall be installed on the pump.