With its flattened seat edge, the Fit Sit seat helps you sit upright with thighs that are slightly sloped to provide perfect relief of the spinal disks. The chair is also available with a backrest that adjusts in height and depth to use as a workchair, or without a backrest to use as a workstool. You can adjust the seat height to three different ranges to achieve the optimal height for working: 47-59 cm, 51-63 cm, or 59-78 cm. A gas spring can be operated using a hand lever under the seat to adjust the height. The work stools have a highly polished aluminum base and feature safety castors to keep the chair positioned when no one is sitting in it.