UNKNOWN
Firstly, they used a cube.  They tortured us daily for the two weeks that we spent there.  They also used a ............ they would handcuff our arms and our legs and they would put something between your knees and your hands and then they'd put two tables together and put you between those tables with your head upside down.  This affected my arms and my legs.   If you were tall enough so that your had touched the floor they would lift the two tables so that you can hang.  At the time you would have nothing on top and they would push you and beat you with a sjambok all the time.