Add additional flair to your chair by improving mobility and comfort. Arm sets can turn a standard task chair into something someone can work in all day. Sets allow a place to rest the elbow, offering additional comfort on the job. Headrests help support the upper body on chairs that only support the the lower back. Casters and glides take stationary chairs and make them mobile. Roll or glide across the floor to wherever in the office you need to go. Casters are standardized to fit assorted brands of office chairs.