Heads provide functionality to a mast or tower by extending it to make space for:
separate banks of antennas mounted above one another
brackets to meet specialised equipment requirements
stand-off bars to minimise the amount of signal interference that can occur with antennas in close proximity to each other.
Mast heads are often the cheapest part of a tower infrastructure project.
The correct style of mast head can ensure the best possible RF performance, and make installing equipment hassle free.