Fit Sit is designed to provide relief to the spinal disc of the user with upright sitting and creating a seat with the thighs slightly sloped. The seat has a flattened edge that supports sitting in this manner. Fit Sit can be ordered with or without the backrest. Both height and depth can be adjusted in both the backrest and work stool models. Seat height has 3 diverse adjustments that are based on working height and/or size - those adjustments are 47-59 cm, 51-63 cm and 59-78 cm. Gas spring with under seat lever makes seat adjustment easy. Safety castors keep chair positioned when unoccupied and make moving easy when occupied. Bases is polished aluminum with the column being chrome plated.