It is suitable for Φ12.7, Φ12.9, Φ15.24, 15.7 strands, and can apply to pre-stressing or post-tensioning structure, for the floorslab no need the beam or the thickness of the beam reduced. Using mono jack for stressing, can be auto-anchoring, but also by press device anchoring while the top of jack installs the press device and the oil route of the pump has to be controlled by valve shunt.