1.multistrand jack 2.mono jack 3.good quality and low cost YDC Multi-Jack for post-tensioning AS a new type through jack,YDC is mainly used to tension of anchor groups and operated easily and reliable, saving a good deal of steel strand. YDC Through Jack Parameter TYPENorminal Tension(KN)Norminal Oil Pressure(MPa)Trough Core Diameter(mm)Limit Block Diameter(mm)Anchor Tools Diameter(mm)Outer Size ...