LX One-Stop Rotational Control KitThis adjustable rotation kit controls the range of motion of the LX arm, so the extension doesn’t come in contact with a desk panel or divider.Product Benefits- Stack one or two one-stop rotation kits to adjust the range of motion from 0- to 300-degrees- Prevents the extension arm(s) from hitting the wall- Easily attaches to the pole and secured in place with two set screws to prevent stop rotation