The Leckey Squiggles Seat Shoulder Support pushes the shoulders forward (protraction) for children that have a lot of high tone in their shoulder muscles and tend to pull their shoulders backwards. The Shoulder Support helps to keep the shoulders in line with the head and trunk for better alignment and balance with the position of the pelvis. The hardware is included with this product. Shoulder Support also increases the back height of the chair and adds to the growth potential of the chair.