Tilting the lens downwards doesn't actually increase the depth of field. It just changes the angle of the depth of field you have. How that angle intersects your subject will affect the depth of field you see.
Since the pens are tilted towards the camera, changing the angle to run more in parallel with the pens will increase how much of the pens are in the DoF.
The Super-Rotator allows the entire lens to be rotated 360º. So, the bending of the lens can be done all the way around the circle: tilt (up or down), or "swing" (to the left/right), or anywhere around at 30º click stop intervals.
Canon's TS-Es can also do this, but only allow the shift to be done either in parallel or perpendicular to the tilt axis. On the Super-Rotator, they're independent of each other and able to be set anywhere around the 360º.