Adjusts “up and down” seat height relative to the floor.
Allows seat “rotation” in a full circle.
Places the “pivot point” directly above the base center and allows the user to lean back in a seated position.
Allows user to adjust “resistance” with which chair reclines or tilts.
Allows user to select and “lock a particular back angle.”
Allows user to “adjust arms up and down, or in and out” within a set range to accommodate a variety of tasks.