An ordinary carpentry screw clamp of greater length can be successfully used for internal clamping – expanding. Such pressure may be needed e.g.. when gluing elements to the inside sides of the cabinet. For this purpose, the movable jaw of the clamp must be removed from the arm and inserted the other way round. When pressing, the top of the fixed jaw rests against the opposite wall, and the object to be glued will be pressed with the foot of the movable jaw. This mechanism guarantees a very strong pressure.
