Horizontal axle toilet paper holders are a common fixture in homes and schools due to their user-friendly design. These holders feature a horizontal axle that supports the toilet paper roll, offering low friction and easy refilling. When people think about toilet paper orientation, they often envision this type of holder.

There are different variations of horizontal axle holders. Some have a fixed distance between the roll and the mounting surface, while others utilize a hinged or grooved axle that moves with the roll as it shrinks from use. These designs increase friction, making it simpler to tear off a piece of tissue when needed.

More advanced designs include features like a curved horizontal plate that covers the roll, eliminating the need to touch it directly. Additionally, some holders have a protruding horizontal bump that adds resistance, making it effortless to pull off individual sheets of paper with one hand.

While these holders can accommodate both under and over roll orientations, they may be less convenient to use in the under orientation due to their design features.”