Base of 5PHH50 has beveled sides for fingers to rotate the platform by its knurled edge. You may transform a polarizer holder into a rotation stage. For this you'd need to order an insert platform 5PHH50-1A1 separately. To mount components on it the platform has a pattern of M4 holes and a central Ø7-to-M6 hole. If you need to fasten to the central hole a unit with M4 mounting hole, you can slip an M4 screw through this Ø7-to-M6 combined hole (see the drawing for 5PHH50-1).
This mount is also compatible with Ø25.0 mm optics.
Polarizer Holder 5PHH50-1 also could be used as a graduated rotator in combination with 5MBM24 or 5PH51-1 or other mounts as it shown in the picture.