Pivot Hinges:
A Pivot hinge is a type of hinge that attached to the top and bottom of the door. With the pivot hinges there can never be more then 2 hinges, therefor the pivot hinges carry the most weight per 2 hinges then almost any other hinge in their class. There are many benefits that come with using pivot hinges. Because the hinge cut-outs are on the top and bottom of the door, the hinge can be locked in place with setting blocks placed in between the hinge and the glass cut-out to prevent the door from slipping. The weight of the door is carried by the glass sitting on a rubber block on the bottom hinge, so it does not hang on the wall. Unlike the wall mounted hinges, if the tile wall that the door hinges from is not flat the pivot hinges will still function perfectly because the hinge pins will always line up with the hinge cut-outs in the glass. They are not dependent on how flat the walls are.
One of my favorite things about the pivot hinges and the other clips and brackets is that all of the hardware is at the extreme top and bottom of the glass enclosure. This helps to keep the center open and unobstructed to show off that beautiful tile work.