That means they are leak-proof sealed. The damping action of Sachtler heads is identical in both the horizontal and vertical planes. You can disengage the drag for fast pans. Positive action, faster than the rest. The Touch and Go automatic locking system.
Time is always of the essence.
The Touch and Go plate is secured to the camera, which then locks onto the sliding balance plate. When you set up the camera for the next shot you still have all the original settings. When you finish the shoot just disengage the latch. A locking lever prevents inadvertent disengagement of the camera latch.