Universal Support Arm Clamps to most wheelchairs and is an invaluable device for increasing the userÊs range of activity in work leisure and other activities of daily living * The arm is made of telescoping aluminum tubing that allows rotational and axial adjustment * Angle adjustments can be made for a wide range of positions for the accessory holder * Plastic knobs lock the holder at any angle * Maximum holding capacity is 5 l (2.3 kg) * The arm has a camera support with a standard 1/4 -20 thread for camera thread wells *