The use of a lightweight hollow cylinder jack in conjunction with the patented Tri Nut allows the compression of plates to be carried out evenly, squarely and efficiently. hydraulic cylinders simultaneously compress the plates.
The TriNut is designed to fit over the major diameter of the thread until it engages into it spherical seat. This closes the nut onto the thread and the nut is screwed home as normal. This facilitates speedy fitting and removal of the tools removing the need for running down the nuts over the full length of the thread.