PL Depot offers many of the mounts to attach the mast which holds an antenna to a building, structure or even the ground. Base mounts hold the bottom of a mast steady while you guy the top with guy wire. We also offer antenna mounts for use with chimneys, which use a set of straps and a bracket to hold a mast to a chimney (sold as a set of 2). Wall mounts are sold in sets of 2 and extend out from the wall 3 to 18 inches, depending on the size of your roof overhang. It is best to keep the antenna mast mounted as close to the wall as possible and spreading the set of mounts 3 feet or more apart will give you the most stable installation. The Eave mount is a special wall mount that is used at the peak of a roof. A vent mount will hold a mast to a pole or vent.