Leyform executive design office seating are designed for management personnel, and executive offices, etc. These office armchairs must swivel, and may include adjustable lumbar support + headrest and comply with ergonomic standards and safety requirements for operators. Leather executive office seating by Leyform may be equipped with fixed or adjustable armrests and are adjustable in heigh by a gaslift. Castors are self-braking and are provided with soft treads for hard surfaces marble, wood and tile. High back chairs with castors must be stable and allow the user a certain freedom of movement and a comfortable position. Mechanisms for raising and inclining seats must be individually adjustable for leather office furniture armchairs so as to ensure that these can be adapted to users different needs sizes and postures. Adjustment systems must be easy to use, and located so as to avoid accidental adjustments.