The device has two parts, the first is an expansion shaft and the second is a handle. The expanding shaft is designed for use with headrests 14-18 cm wide. The handle, on the other hand, is for devices with a width from 4.7 to 12.9 "(~ 13.5 - 23.5 cm). The arms of the handle are foldable, so when we do not use the handle, it is unobtrusive. free setting of any angle of inclination and rotation of the device by 360 degrees The handle is made of high-quality polyurethane, aluminum and polycarbonate.