The reliability of the chin up bars is given by the construction. Both the wall and ceiling plates possess slots for the cross-member. Each cross-member is put into the slot and welded on the front and the rear side of the plate. By this constructioin, the cross-members are located 8mm deep in the mounting plates.

The images below show the mounting plates with the slot and the cross-members in the not welded state.

Picture 1: Slot in the wall plate (wall mount)

Picture 2: Slot in the ceiling plate (ceiling mount)