Greiner work chairs with foot release come with two choices in backrests. The model with the double spring backrest is absorbed in the recline position. You can adjust the backrest depth and height for individual needs. The semicircular backrest swivels 90° and it can be mounted either on the right side, left side or center. The backrest goes backward 11° and it can lower to the lumbar vertebra region. It can also have a forward incline if desired. The special foot release that Greiner has developed for these stools and chairs has impressive functionality when the user is working with dirty gloves or sterile gloves. The foot ring is standard and you disc for adjustment can be triggered from any side.